Help! i don’t know what to do

Milly

so i have these bumps that sting when i touch them and its around my vestibule and under my clitoris. it hurts when i touch it and it seems red and irritated. i have three guesses as to what is wrong with them

either i had some irritant on my fingers and touched my vagina

scratched myself somehow

got some sort of allergic reaction

or caught a sexual transmitted disease