pregnant?

Okay so I got in a car accident and now our attorney wants us to go in for a check up and I'm having back problems and I'm afraid that they will make me get X-rays and thing like that but I'm just afraid that they will come back and say I'm pregnant. I'm going with my mom and I'm a freshman in high school.  The last time I had sex was a week and a half so ago and I checked the condom after and it didn't have any holes or anything I'm just scared.