I am 17 year old girl I have hypothyroidism 7 is my tsh I am having my thyroid medicine and my weight is 75 I still have irregular period and I have only spotting type of period and firstly I used to have heavy period I found it out when I have period for month doctor suggested to do blood test and found I have thyroid I having thyroxine 35 mgh medicine long period are stopped but still have irregular for like 5 days and only spotting occur, no cramps, but spotting is a little bit heavy sometimes but not as compared to my real periods my regular period used to be of 5-7 days and heavy and this irregularity is first time my monarch is 13 year age.