Please help me, I am young and I am in desperate need of help-I think I over masturbate too much. I have been A LOT for at least like 4 years and now my vagina is looking bruised up, and very recently I found a bump on the skin tissue and it is about the size of 2 or 3 pimples. I am afraid that it could be cancer, because the size is not normal, and the cells around it on the tissue look a little more popped out. I’m not really sure what to do at this point but I am starting school in a few days, and if this is a serious matter then I need to be notified ASAP. I’m not sure how I will tell my parents about this and I am very scared. PLEASE help me.

Assuming that you are not having sex with others, and thus can't have an STD:
Harmless growths and big pimples and cysts are very common, whether you masturbate or not, both men and women.
Masturbation does not cause cancer. The chances of your bump being cancer are slim to none.
You can see a doctor or go to a walk in clinic. Or keep clean with soap and water, pat dry, air dry after that, maybe put some antibacterial cream on it, or just a band-aid, and try not to irritate it. If it's near hairs, it might be an ingrown hair.