I had mine checked in Nov before starting ttc as i was having very irregular cycles and wasnt sure if I was ovulating. It was 4.5 and she just wanted to watch it and come back in Jan to have it checked again. It was 3.7 and the same day I had my progesterone checked which was 11 (you want it to be greater than 10), so that proved that I ovulated. And my dr wasnt worried about that level, so I think you should be fine!! But if you're still worried, I would maybe recommend getting it rechecked in about 2 months to see if it goes down, and you could also get your progesterone checked that same day to know for sure if you ov.
Ideally, you want to get your prog checked 1 week after you ov, but obviously, if you're not sure if you do ov., the easiest thing to do is to go on day 21 of your cycle (if you have a regular 28-day cycle) or 1 week before you are supposed to start your period. You can even go on day 25 if your cycles are little bit longer. I think I went on day 28 bc my cycles are longer.
It gave me a lot more piece of mind since that month was the first month ttc.
This may be more info than you were looking for, but I hope it helped. Good luck to you!!
oh, and i think that TSH level (1-2) for ttc is for people who have hypothyroidism and are currently taking medication for it.