After taking clomid (clomiphene) and progesterone, is it normal to have a heavy menstrual cycle with large blood clots?

Possibly: If you have not had a period in a while, the period after progesterone may be pretty heavy. If you were having regular periods before, this may not be normal. You need to discus this with your GYN.

Clomid (clomiphene) and aub: Yes. Hopefully you are not taking both at the same time. I am assuming you are taking progesterone only on the second half of your cycle.