Bleeding

I did the dance with no pants last night with my husband, this morning I woke up to bleeding. It’s not period as I am 9 days away from my period. I’m actually feeling really tired and I had cramps early I did the usual thing and googled and it came up with lots of possible causes which some of them I don’t even wanna think about. I’m having to wear a pad because it’s actually a decent amount of blood. Just wondering if anyone has had this and how long it last? Thank you