Bleeding after fingering? HELP

My boyfriend and I got hot and heavy on Saturday and one thing led to another and he ended up fingering me (nothing too deep). His hand came away slightly bloody and I just wrote it off as a hymen stretch. However I kept bleeding until Monday and we met up again, he fingered me again except this time his hand came back non-bloody but a few hours later I'm still bleeding. Is this common? I've never had anything inserted into my vagina before (including tampons) so this is the first time anything's been up there. I also slipped my period this month for the first time (as I'm on bcp and I had prom when I was supposed to get it idk if that means anything). Pls help