Hello, I Am 21 Years Old And Had Sex For

Hello, I am 21 years old and had sex for the first time two Saturdays ago. It was the first day of my period, he pulled out, and we used a condom of course. I'm on birth control, but I got back from Europe a week before I had sex, so im not sure if that would mess it up. I continued my period and it was pretty heavy up until I started taking the regular birth control pills again. However now, almost two weeks later I am extremely bloated with some gas and my left ovary kind of hurts. This has been going on for days. I am pre medicine so I know that after you have sex UTIs are common and some women have these symptoms, but I'm also worried I could be pregnant. Any insight?