What Do Little Bumps On Inside Of Labia Minora Post Unprotected Sex Suggest?

Hi, I have a bit of a problem. I have these little bumps on the inside of my libia minora, kinda surrounding my vagina hole. They DO NOT itch, burn or bleed or anything. However, i had unprotected sex yesterday and they showed up when i woke up this morning. Do you know what it could
possibly be? Any suggestions to treating this or preventing it? I don't really think its an std, because me & my partner were virgins and haven't had any sexual intercourses with anybody else ever.