I've been on HRT for a couple of years now. Mostly it's ok, but I noticed early on that it really brought my period pains back! I had hardly experienced a twinge since childbirth. Feels very unfair!
It's particularly nasty this cycle and in fact I'm still in bed, as the pains and nausea were making me feel like taking it easy. (I have lots of home based admin to get on with from my bed.) And I finally got up and showered just now, and found this horrible SLUG on the loo paper! It seems actual tissue - womb lining I assume - rather than a jelly-like clot. Assume that's all par for the course? My cervix hates being dilated so that's probably why I felt so crappy earlier this morning. (Pic in comments)