Kayla,
you need to (i know this is emabrrassing but!!) show your mum

, I think i'd prefer to show her before having to show a dr - right now you're stressing out over what may be nothing - maybe a hemarrhoid(sp?) or if it is a tumour then the longer you leave it the worse the problem may become. So many people leave medical things because they're scared or embarrassed & that is often when they regret what could have been simply fixed & but then can't be or at least not simply.
You will also need to be prepared to answer questions to your mum & the dr about things like sexual experiences, bowel motions, bleeding from your anus, periods - regularity & blood loss etc, & other things.
Pm me if you want to talk, I may be alot older nut I have a 16 year old daughter & I know how awful this would be for her & how embarrassing.
Take care & pleasee talk to &

show your mum.