hello there, I have been diagnosed with an underactive thyroid, my original diagnosis was in 2002 and my T4 was 10.5 and TSH levels were 9.59. I did not go on any tablets as I did not know how badly it could effect my life and just did not want to be on medication for life. I about a year ago I was blood tested again and my TSH level was 137.60 and free thyroxine level was 7. I am currently taking thyroxine 100mg a day but still feel awful. I seem to be suffering from pmt/pms much harder since taking the medication I seem to be all over the place from my mid cycle to period, very tearful.... My partner thinks that since I have been on the medication that I have been very snappy/spikey. My current form of contraceptive is an IUD flexi T 300. I am 35years old. Could it be that because I took so long to medicate myself that I will take longer to feel normal again?? If anyone has any help experiences or advice I would be most grateful.