What Is The Treatment For Bump Near The Vaginal Opening?

Well i had sex a cpuple days ago with this guy, we didn't use protection and a Day After I Went to the bathroom and wiped and noticed It was sore.. so i took a look myself and felt around and noticed at the tip of my clip and was A Real little bump and was sore.. The same color as my clit but it freaked me out.. so i went a little lower and noticed It was really sore On the right side.. not my lips I'm not sure what its called but its under the clit. right before you enter the vagina. but Its creeping me out and before i go get checked i wanted to see if its normal or serious or what?