Many people who menstruate deal with mood swings during their period, but at a certain point, PMS symptoms can actually be premenstrual dysphoric disorder (PMDD). While moodiness or fatigue while you're bleeding can be uncomfortable, PMDD is far more debilitating than PMS, Christine Scott-Hudson, MA, MFT, ATR, a licensed psychotherapist and owner of Create Your Life Studio, tells Bustle.

"For those who suffer from PMDD, their hormonal symptoms are intense and disrupt their daily lives," she says, "including their work lives, school lives, and social lives, especially their interpersonal relationships." This is not something to just shrug off as an expected part of getting your period, but something to bring up with a doctor and potentially a therapist so that you can get some help.

"There are many different ways to help you manage PMDD, from medication to [lifestyle changes] to herbs, to mindfulness and relaxation techniques," Scott-Hudson says, so if you are breaking up with your partner every month before your period, or if you are thinking about quitting your job every 28 days, don't hesitate to seek help.

With the onset of your period, you might find yourself reaching for your trusty heating pad or a bottle of pain medication. "Relatively milder cramps or pain can arise during your period," Dr. Luk says. "However, if you have severe pelvic pain, low back pain, or leg pain, this may indicate changes in your reproductive system." For example, this kind of intense pain could possibly point to uterine fibroids, she says, which are non-cancerous uterine growths that can sometimes lead to serious health problems like an enlarged uterus and abdomen or infertility.

If you're experiencing cramps, you might not feel in the mood to have sex (or you might feel totally in the mood). But experiencing pain during sex that isn't cramp-related isn't something you should just put up with. "Although not always, pain during bowel movements or pain during and after intercourse can also be sign of endometriosis," Dr. Luk says. And this is something you'll want to talk to your doctor about.

Every body is different, which explains why menstrual products come in a variety of flow levels. But while very heavy flow during your period can also seem “normal,” it's worth consulting your physician about it, especially if the amount you're bleeding has changed recently. "Heavy flow can sometimes, but now always, be a symptom of uterine fibroids, hormonal disorders, or pelvic inflammatory disease," Dr. Luk says, so asking your doctor if what you're experiencing is healthy for your body is definitely a good idea.

You might think that a little spotting in between periods is no big deal since it's not much, but this is definitely a symptom you want to get checked out. "Spotting can be due to multiple reasons including pregnancy, polyps, and sometimes even cancer," Dr. Luk says. "Although usually nothing alarming, it is better to keep your physician informed to be proactive of your health."

For some folks, their period arrives on the dot every 28 days. For others though, it can seem like a total guessing game as to when the first drop will show up unannounced. "Irregular periods can be a sign of PCOS," Dr. Hedieh Asadi, co-founder of DeoDoc, tells Bustle, "which is polycystic ovary syndrome, in which there is an imbalance of hormones and ovaries accumulate small cysts." If you start missing periods or if you just want to make sure that everything down there is shipshape, schedule a visit with your doctor and ask any questions you might have.

For many people, menstruation is synonymous with cramps (and chocolate), so it's easy to assume that when you start to feel period pain, you just have to ride it out until you feel better. In actuality, though, this isn't true at all. "Cramps are a sign that something is amiss in the body," Felice Gersh, MD, OB/GYN, the founder and director of the Integrative Medical Group and the author of PCOS SOS, tells Bustle. "One of the most common reasons for bad cramps is a magnesium deficiency," she says. "Magnesium is a key player in muscle function and the uterus is a muscle!"

Make sure your body has plenty of magnesium by taking a magnesium citrate or glycinate supplement at 500 to 700 milligrams daily for a couple of months, Dr. Gersh says. Also, add extra omega-3, a B complex, zinc, vitamin D, and vitamin E, to make sure you're getting all of the nutrients you need. If your cramping still isn't improving, it’s definitely time for a visit to the gynecologist, she says.

Headaches might seem pretty innocuous, even if they acompany your period. "But getting a migraine with each period is not normal," Dr. Gersh says. "Many underlying conditions can trigger a migraine, such as sleep deprivation, high stress, alcohol, and nutrient deficiencies — particularly B2 (Riboflavin) and magnesium," she says. But getting a migraine at the beginning each period pretty strongly suggests that a drop in your estrogen levels triggered the migraine.

To address this, you could take supplements like Riboflavin and magnesium, Dr. Gersh says, but if that doesn't help after a few months, definitely loop in your doctor, who could potentially tell you to use an estrogen patch for the few days leading up to the period and for a day or two into the period.

Blood has an odor, so it's not unusual for your vagina to smell like blood if you're bleeding from it. But another smell during your period isn't so harmless. "That 'fishy,' unpleasant odor, for instance, can often be the sign of something more serious like a vaginal infection such as bacterial vaginosis (BV)," Gregory Kaufman, MD, FACOG, OB/GYN, tells Bustle. While this may sound scary, it's actually the most common vaginal infection, affecting more than 21 million people in the U.S. each year, he says.

While many people are tempted to self-treat, this is really not a good idea. A healthcare professional is really the only person who can properly diagnose and treat the condition, Dr. Kaufman says, so get in touch with your doctor to address this bacterial imbalance, which can potentially increase your risk of STIs, pelvic inflammatory disease, and more.

If you feel uncomfortable during your period, whether it's thanks to super heavy bleeding or painful cramping, never assume that you just have to grin and bear it. Your doctor is there as a great resource to help you feel your best, regardless of what time of the month it is.