Your Flow is Unusually Heavy
The menstrual cycle involves shedding the uterine lining, but the flow of tissue and fluid is typically consistent through the months and years, especially once you reach adulthood. If you notice that your menstrual flow has suddenly gotten very heavy, it could be a sign of uterine or hormonal health issues. Visiting an endocrinologist or your local fertility centers may be a good idea if this is consistently happening and it's not the norm for your menstrual cycle.
Your Periods Are Extremely Painful
Pain during menstruation is normal, and it's not necessarily a sign of infertility. But if you're suffering from extreme menstrual pain, abnormal vaginal bleeding, or irregular uterine pain, it could be a sign of undiagnosed endometriosis. While it's not necessarily a sure sign that you're infertile, endometriosis can make conception difficult.
You Don't Menstruate
If you don't have a uterus or ovaries, you shouldn't have to worry about menstruating. But if you do possess those organs and you've either never had a period or you've suddenly stopped menstruating, it's a sign that you may not be ovulating at all. This is one of the clearest signs that you might be infertile, and it definitely warrants a visit to your OBGYN.
What You Can Do
Almost 6.7 million women have impaired fecundity or are infertile, but there are options available to you. IVF clinics exist, as well as fertility treatments and specialists who can help you learn what's happening in your body and how to remedy it. Being infertile doesn't have to impair your life or your goals anymore.
But before you go seeking treatment, make sure you're listening to your body! The sooner you learn what to look out for, the better off you'll be in the future.