I know that Polycystic Ovary Syndrome (PCOS) is often linked to hypothyroidism.....this causes irregular menstrual cycles and at times, heavy bleeding. My endocrinologist is pretty sure I have some sort of hypothyroidism (read: I have a crazy medical history these past two years, so it's hard to tell with my test results) for which I take 50 mcg of Levothyroxine daily. I was also recently diagnosed with PCOS. It makes sense that if one of your hormones is off-balance, your other hormones are more likely to do the same.
Anemia has also been linked to hypothyroidism, but I don't think it can cause irregular periods--just heavier bleeding--since the menstrual cycle is controlled by hormones.
Hope this helps!
Hmm I don't know the answer but I have lack of periods maybe like 3 a year the last 2 years.
What about anemia?
After giving birth this past March, I have always had irregulary periods (1-2 weeks late)I was recently diagnosed w/ hypothyroidism and have been on Levthyroxine for 4 weeks. I have not had a period since starting meds. I am now 3 weeks late. When you were taking meds for 5 years were you regular? I'm probably not much help but I can understand what you are going through. My problem is that we are trying to conceive again.