On Monday, the doctor decided to test my thyroid again since Stupid Doctor had said it was all ok.
Good thing we did, since the levels indicating an underactive thyroid were ridiculously high. The Fertility Doctor rang back yesterday and is sending out a new script. Until then, I'm on two tablets one day, one the next.
This is a change in the last month, though, and doesn't change the fact that we've had 19 cycles of trying prior to that. So we're still going ahead with treatment.
But it's nice to know there was a reason I was feeling bad!