Hey, I have a very important question!!

Okay, well i found a bump and its not a normal one its right by my opening and if i sit wrong it hurts if i touch it, it hurts, i couldnt even wash properly today because it hurts alot, i know i should go to a doctor but mine isnt the best one, i feel to werid around him, so i was just wondering if anyone here might have an answer to why this happen i had one before but it didnt hurt and it went away after a few days, this ones been here for atleast half a week.

So if anyone has any answers or anything please let me know, thanks.