Help......POCD or Sick

Hi. I'm a teenager and I recently have been having a really bad time with ocd. Recently this memory cameto mind. Let me explain. I was 14. I was sitting watching something about kids who were siblings on TV. Then a really intrusive thought came in out of the blue. The thought was an image of forcing kids together. I dont remember whether I freaked out or not. I know I most likely immediately stopped and made sure I wasn't aroused in any way since that was a compulsion I had. But then I thought about it curiously....and ok here's the bad part. I masturbated kind of when I imagined the anxiety of realizing that had happened to me bcz I have a sibling. I know right....it wasn't real arousal, o think it was anxiety causing "arousal". Ik I'm not a pedo the initial thought was just outta the blue. But I still feel sick
I had self harm thoughts and tried to cut because of this.