okay so last night I did some anal masturbation and I tried to shove my fist in there well it hurt and I stopped. Well I noticed dark red blood similar to lipstick coming from my butt it wasn't alot but enough it scared me. maybe about enough to fit on a penny.  Well i waited and now today I am constipated and when I went all that came out was Bright Red Blood.  should I be scared.  i'm 17