Hi and welcome to the board

!
Did you get a ++OPK on cd 22 last month? If so, then you might have O'd anywhere from cd 22 to cd 24. And if your cycle was 30 days (meaning that AF showed up on cd 31), then your luteal phase would have been only 6-8 days long, which is considered too short to allow for implantation. A normal luteal phase is 12-16 days long, with 10-11 being considered borderline ok, but anything less than 10 days too short (implantation takes place between 6-12 dpo so if your lining sheds prematurely, then the pg doesn't have time to attach properly).
Have you had your progesterone tested at 7 dpo before? If not, that's a good starting point. You may benefit from prog. supps after O. Also, is your hyperthyroidism under control? If you can get that stabilized, then you may find your cycle self-regulates as well. I've seen several people here with thyroid issues conceive, so it's possible!
Good luck and keep us posted++++++++++
Maura