Need a little advice..........?

well for the last day or so i had terrible pains in my groin, so bad its affecting my walking. im limping at the moment, saw the doctor today.....im quite shy about undressing, especially in front of people. saw a female doctor which made it a little less daunting, but still not completely comfortable...anyway, the doctor wants me to get an ultrasound to rule out a hernia (which i totally understand), but the whole....having someone scanning my groin area is gonna be a little daunting. is there any possible way i can make myself a little more relaxed about it all? im only 16 so i don't feel comfortable undressing in front of others, even just taking my jeans off (leaving underwear on) for doctor today....any possible way i can be more relaxed about the whole thing? thanks in advance