Bleeding during/after sex

Hi! I had sex with the guy I’m with today, and when we were done he noticed I was bleeding - a lot. I got up to go to the bathroom after he cleaned up and not to be graphic but it is literally everywhere. Like I dripped the whole way to the bathroom and the toilet was bright red. I put an overnight pad on and it’s basically completely soaked right now and this was less than an hour ago. I asked a friend of mine and she said to keep an eye on it, if it doesn’t hurt I should be fine but to make sure I’m not losing too much blood. I just had a Pap and it looked normal despite testing positive for HPV but my doctor is keeping an eye on me and I’m otherwise healthy. I started birth control pills again about 2 weeks ago. I’ve never had this happen before - I’ve bled once or twice a little bit after a period without sex but never this. It didn’t really hurt during, and I’ve basically just spent the time after cleaning it up but I don’t know how much blood is “too much” where I’d need to go to urgent care or something? Has this happened to anyone before?