I took Synthroid for about two years for my hypothroidism, it rea...

I took Synthroid for about two years for my hypothroidism, it really helped me to feel better and get my weight more on track. Since I have moved to a different state, thus a new doctor, I have been taking the generic for synthroid (levothyroxine). This has been for about 6 months. Since I went off the pill three months ago, I have not had my period. I just had my TSH level checked and it is normal on the generic, but I still haven't gotten my period. Can anyone help me??