HCG can cause an increase in estrogen, so this is in part why your estrogen might be so high, you're going to have to give yourself time and your body to recover from being on that sh*t.
I'm not a fan of oral propecia and I don't think it helps in all but the most obvious cases of androgenetic alopecia.
You're going to have wait until your body adjusts to not being on a hormone secretogogue and yeah that might cause shedding.
You're taking too many conflicting things at once, and it's going to take a couple of months for your body to unfuck itself from that, lay off the oral propecia, remain with the topical however.
I expect a bit of a shed from going on min, but that's just par for the course, it will come back and be stronger than it was, you have to focus on things that will induce hair growth first, instead of trying to do a million things at once.