I started dating this guy about a year ago and he had sex with another girl before getting with me. This girl was apparently a virgin and so was he at the time. They then got back with me and we did stuff such as oral sex and touching each other but never sex.

Now I am terrified of the idea of me having an STD or an STI because sometimes I get an itchy vagina once and a while and also recently I've had a pain in my vagina (noticeably when I get turned on)

It has been 10 months since we broke up. Do you think it's possible that I have an STD or STI from what I've described?