TMI I am bleeding so much - endo?

I'm mid cycle and I have had SO much bleeding lately it's not even funny. It also comes out of nowhere so I have soiled two pairs of underwear now. The first pair looked like I was on my period! Today I had such bad cramps as well. I am past my ovulation by a few days (I tracked my cycle for years but don't anymore, but my cycle hasn't changed). Could this be a sign of endometriosis? My period have gotten heavier and more painful lately, and both my tubes are blocked. My fertility doctor didn't mention a concern for endo though.

Edit - my period is 12 days away though (and it's extremely regular, to the day per the app 8 times out of 10). I'm only like 4 DPO.

I've been passing small clots this past week. During my period I pass fairly big clots. Depending on the day I might go through three/ four pads a day. Sometimes have to change during the night as well. Have to take like three painkillers with codeine just to get comfortable enough to sleep.