Bleeding after sex

Hey guys!

Before last week, I had not have sex in a few months. I recently got together with a new partner who is very, well, vigorous. I had sex probably eight times this week, which is much more than I have ever done before. A few days ago, my partner went down on me for about an hour followed by sex, which was great. But soon after that, I noticed I was bleeding. It’s been about 4 days and I’m still bleeding as if I’m on my period, but I am on the second week of my pill pack and should not be bleeding. I took a pregnancy test just to be sure and it came back negative. Has anyone ever experienced this/ does this seem normal for “overworking” my 🐱?