I have been always using a condom, without any exception, my partner didn’t have anyone before me and neither did I. We both had oral sex without protection though. Today was my predicted first period day, but I didn’t get it because my cycles are irregular. We had sex today and after and during (while switching positions) it started to burn a little down there. Also it burns when I pee for like 30 seconds. I’ve never had this before so I’m asking what could it be? Thank you