I stuck my finger up my and now I think I've messed something up..?

Everybody has . All the time. I'm 15 and didn't want to do that yet so I stuck my finger up my and pretty much f***** myself. But now, I think that I might have messed something up. I won't quit bleeding and I have like really bad black leakage coming from my . I keep waiting for it to just stop and I'm acting like I'm just on my period but it won't stop. I'm kinda scared and I also continue to masturbate but I don't know whats causing all of this. Any help please!!?