I think it's great about
the thyroid....just keep checking it...as you don't want to take too much of the hormone.
Did you get your estrogen and progesterone tested since the hot flashes started?
You might want to see where they're at.
No, I don't think it's coincidence....your body is responding to treatment.
I'm not sure your gyno will 'get it' though...
You can try to explain it...but good luck with that....