Hypothyroidism

So, I have hypothyroidism. One of my biggest complaints about it is my period problems. Some of my periods will last a month or more. My longest was 71 days. And this isn't spotting or light bleeding. It's a full on period for this amount of time. I get so frustrated about it cause it does affect my life. Can't have sex as often, moody all the time, can't wear clothes I want to wear for fear of a leak, always bloated and can't get pregnant. I feel like my doctors just brush me off when I complain about it. Does anybody else have these issues? No one I know does so I just feel like they don't get it. Anyone have some advise that could help?