bumps on labia minora

Okay, I'm 20 years old and only have had sex with three men and all of whom i know very well and am positive that they don't have STD's. There was one incident over the summer though where I was drugged and taken advantage of. The next day however, I was able to find out who the guy was and asked if he had any diseases. He said no and that he used a condom. (really messed up situation I know) but I was relieved to hear that he was kind enough to wear protection. That was four months ago. Five days ago I noticed an irritation on my vagina. My boyfriend and I had, had rough sex a few days ago so I didn't really think much of it. Now though I have a few more bumps and am worried that I have an STD. They hurt to the touch, are itchy, and it burns to pee (sometimes). Should I be worried that I have an STD? ... I've been reading that they could come from stress. I did just have finals and get waxed for the first time. I'm just trying to be hopeful. I'm going to see my OBGYN in a couple days but I just am so freaked out for the time being. :(