Bleeding after sex

My period ended on Sunday after about 8 days. Pee and wiping was clear. My bf and I had sex, which was pretty rough, on Tuesday night and I started bleeding again. A bright red, not like old end of period blood but like mid period blood. It’s now Thursday and I’m still bleeding. (I mainly only bleed when I pee and wipe there’s blood) Kinda panicking so has this happened to anyone else?