I had a chat with an endocrinologist about my raised TSH (3.79) but he did not see anything wrong with me. He said it's possible that it's a very beginning of underactive thyroid but too early to say for sure because TSh can go down and my T3 and T4 have robust levels (he would be concerned if they were on lower side of normal) and negative antibodies is also a good sign. he also examined my neck and did not find anything wrong. I told him that I am hoping to have IVF and that TSH of over 2 might be an issue but he said it should not be. easy for him to say! he would not recommend that I start taking synthetic hormone just yet. he also said not to overdo it with iodine. basically the dose that is in a multivitamin is OK but no other iodine supps or see weed supps. unfortunately, even if I am beginning to develop underactive thyroid, there is nothing I can do to stop/delay it. if it happens I just have to go on synthetic hormone and there is nothing in between that can help. He also did not think my spotting related to thyroid. when thyroid goes seriously wrong it can affect menstrual cycle but my current levels are normal.
I guess I am going to have to park this issue until I hear from my fertility clinic, they are also doing my thyroid bloods and may raise this again.