happens to everyone. happened to me early on in my career - have to admit that getting test results is a huge relief. I think the govt (or maybe it was the hospital/insurance cos.) maintains a list of people with stds - can't remember now what gave me that impression, but i remember being relieved that i was not on the list in addition to the huge relief that i didn't have some serious disease.
anyhow, what happened to me was pretty gross - e. coli infection. farking disgusting.