Vaginal spot or something i dno if you're a GYNOCOLOGIST please read?

this is so embaressinggg! okay so i have this erm small type of round spot or ball or something on my vagina lip or whatever u call it. n its not on the skin its behind the skin. sorry if this sounds disgusting. if i press on it it hurts. i shower daily, i'm a vigrin, change underwear daily. have had this happen to me years ago n it was a bit bigger, but it went by itself. what do you think it could be?