I was diagnosed with sub clinical hypothyroidism about a year ago and was started on 100mcg synthroid which made my tsh level lower than normal. The dose was then decreased to 50mcg and was doing well but then the PA said the tsh level was creeping up faster than he'd like so he increased the dose to 75mcg despite the fact my tsh was still within normal range, like smack in the middle normal, not even high end. Then my tsh bottomed out. He then decreased the dose back to 50mcg and nothing happened. So he finally referred me to an internist who told me to just discontinue the medication entirely. This happened about a month ago. My issue now is that my tsh is slowly recovering but my T4 has continued to increase over this month despite discontinuing synthroid. The PA cannot tell me if this is normal reaction or not and he also is unable to refer me to another internist since the previous one has left the hospital.(military medicine...) I am currently goin though IVF treatment and while the fertility doctor is saying we should be fine to proceed, he is still concerned with my now laboratory-hyperthyroidism. I'm not clinical for the most part, I do have heart palpitations and headaches here and there but not too bad. So my question is, should I go ahead with this ivf treatment? Can I expect my T4 level to come back down? I know tsh takes a little bit longer, but how fast does t4 return to normal?