Progesterone cream and pregnancy/miscarriage

I was on 50mg suppositories twice daily at the start of my pg last year and I stopped all at once when I found out it was a blighted ovum and I didn't even spot -- nothing changed, and my pregnancy sure as heck didn't end. Obviously that is a different situation but it did change my impression of how difficult it was to end a pregnancy.

I looked up a lot to see if there was anyway I could get my body to miscarry and other than practically poisoning myself or giving myself a life-threatening uterine infection there really wasn't much I could do. Really, think about it this way, with all the women wanting to terminate their pregnancies when they don't want them, surely if using and stopping progesterone was an easy way out then lots of people would be doing it and it would likely become a controlled substance. No?