a diagnosis cannot be blindly made by a vague description so i would suggest that you see a medical provider so you can be properly examined diagnosed and treated.
small black/purple bump near vagina/size of a large pimple/slightly raised/doesn't hurt unless squeezed. what is this? . my mom told me to hold a hot wet washcloth up to it for ten minutes and if it turned white it is a pimple and i did that but it didnt turn white.