That's the beauty of being past menopause
. It might be a return of the endo, also. Fibroids are supposed to decrease after menopause
and if they don't, that's another potential problem. So far, all these possibilities are benign until proven otherwise.
Believe me, I asked my doctor a ton of questions and make sure you do, too. Get your money's worth from that doctor's visit.
It will drive you mad to guess at a cause. Leave it to your doctor to put your mind at ease.