I have hyperthyroidism. I got my period once since August. I get the cramps and some other PMS symptoms but I don't bleed. The one period I had was very light and I spotted for a few days afterwards. It was very abnormal. I'm on methimazole 2.5 mg a day. I know my prescription isn't good for a pregnancy and I'm not trying to conceive, but I've heard that your thyroid makes you not drop an egg, and therefor not able to get pregnant. Is this true? Can I get pregnant?