I had a thyroidectomy 15 years ago, and had been on a stable dose of Synthroid (100 mcg) ever since. I am now 9 weeks pregnant. When I first found out (only about 2 weeks pregnant), my TSH spiked up to a 9. Doctor doubled my dose of Synthroid to 200mcg, which sent me into hyperthyroid after 2 weeks. Doctor took me off the meds for a few days because my T4 levels were elevated and I was having hyper symptoms. He then put me on 125s, after about a week and a half he had me test again and this time my TSH shot up to an 18!!!! Doctor put me on 225 and am hoping it will bring the TSH down! My free T4 levels were fine, not low or anything. I am petrified that I have done damage to my babies (I am having twins) and that they are not going to develop normally and have low IQs. I feel terrible!!! Just 3 weeks ago my TSH was good and my T4 levels were elevated, so I'm hoping that since I haven't been too hypothyroid for too long, it won't cause much damage?!?! However, I've been hypothyroid throughout most of my 1st trimester so far, with only a few weeks of having a normal TSH. I'm really hoping that since it's still early and that I'm only 9 weeks that I've caught it in time and that everything will be OK! Everything looked fine on the ultrasound last week (both babies had strong heartbeats and looked normal). I know it takes a while for TSH to come down, but do you think since I'm taking 225 mcg of Synthroid every day that my babies are getting what they need??? Somebody told me that the babies are taking up all the thyroid horrmone and I'm just left with nothing, so the babies should be fine. I'm just the one that is suffering. Especially since my free T4 level was good. I'm just worried sick over this and really hope I haven't done any damage to my babies! Please, I'd love to hear from people that have been in the same situation? THANK YOU!