I have hypothyroidism/Hashimoto's. I was diagnosed when I was 17. I'm now 26. I was on 50mg but since being pregnant, I take 100mg everyday. Before this pregnancy I hadn't taken my tablets for months (then didn't want to just start again without knowing the correct amount). My levels were: TSH: 17 (normal levels between 0.5 - 5.5). T4: 2 (normal levels between 4.5 - 12.5). There was another one too which was ridiculously out of the range. I just have blood tests to make sure my levels are fine and readjust meds when necessary.