Unexplained Fertility - Potential Thyroid Issue?

I have been TTC for a year now. I’ve tracked bbt, used OPKs, tested progesterone, done an HSG, hubby did sperm analysis, and did laparoscopy/hysteroscopy/tubal dye test most recently.

Most everything was normal. I’m ovulating, sperm was good, tubes are open. They found a tiny bit of endo, an adhesión from my C section from years ago, and a small cyst on my ovary that they removed. I’m pretty healthy, and my cycles are regular. Though they are usually 25-26 day cycles with 2-3 days of bleeding.

I’m not sure if thyroid issues could be a possibility for me but I’ve heard some unexplained infertility issues are caused by this and wondering about other people’s experiences and insight on it. Thanks in advance!