I worked in an emergency room and it's no biggie, if you are a woman it's kinda like a pap smear, if you are a male they take a swab to the end of the penis, just inside, not far. They send those off for testing, depending on what they are testing for it can take a few days, or it may happen before you leave. So don't worry about it. It's something to have to do to take care of you. Catch it early and get treatment. The testing is over in no time. You can do this!