Bleeding when I masterbate?

Cathrine
Hello all. So recently I've been bleeding while I masterbate. It doesn't actively run after I'm done but I'll check my hand and it'll have blood. This happened 2x a few days after I already ended my period. It has happened before in the past but only when I do it, not when any of my partners do it. And we'll IM SCARED WHAT THE HECK