What Causes Bump On The Outside Of Vagina?

Me and bf are trying to get pregnant we had sex tues -Friday and Friday night I felt a bump on the outside of my vagina now I have some milky discharge coming out a little bit. I m not sure what s going on I ve gotten tested in jan for stds and HIV my doctor cleared me to start havn a baby. I m nt sure what going I have used the hotel soap and I haven t shaved in a a few weeks I also wore new panties I m not sure what s goin on