What Is Going On? (TMI Picture)

So today I've been cramping like really bad and I'm on BC pills (I'm on the green ones rn for my last week). And today my vagina had been feeling dry and about an hour ago, I felt discomfort and I felt like o had to push and I did and I'm guessing this big blood clot came out of me. I was cramping yesterday but not as much as today. Can someone tell me what this is?