I recently had oral sex with a guy, and when he ejaculated I swallowed. While his penis did touch my vagina, there was no penetration. With the other two guys I have had sex with, I've always used a condom. Ever since the first guy I mentioned, however, my vagina has been itching, I believe I have had a lot of odored discharge, and once it it burned when I urinated. What could this be? If it also matters, when I got with that guy I was on my period and has just started using tampons. Thank you.