I was diagnosed as hypothyroid in '04 and have always had regular normal periods. In May I was prescribed Synthroid. I had irregular periods the first 2 months and now continuous mensturation with 5 - 7 days of no bleeding in between. Sometimes it is very heavy with clots and sometimes it's very light. I have been to 2 Dr's and both said stay on Synthroid and it will "level out eventually." I'm miserable! I still feel the symptoms of being hypothyroid like being cold, can't lose weight(20 lbs overweight), tired, everything feels like a big deal, no libido, etc. They said that my blood test shows a big improvement though. I'm 29 with no kids and would like to start a family soon, but this is hard on my marriage. Please help!