How To Cure Pus Filled Blisters On The Vaginal Lips?

I went to a cookout on friday night and I was wearing oversized shorts without any underwear (I know completely bad) I didn t notice until Saturday that there was a bump on the left upper side of my clitoris. Today I began squeezing at it and it looks like it has pus like a pimple, but there is no odor or abnormal discharge. I am worried, I think it is a bug bite (since I was sitting mainly when I was outside), and I haven t been sexually active for months and when I was I wore condoms. Should I worry?