HI, I had a premature delivery last summer and lost the baby. Ever since then weird things have been happening. I am on synthroid and my TSH is now 4.5 but I have been having the weirdest menstrual changes. First started with a day of mid cycle bleeding and now I am suppose to have my period but it is the lightest is has ever been. I went to GYN last week but she did not seem concerned. Any advice? I want to be pregnanat again but we keep missing.