Hello, I am 27 and had only 2 sexual partners, but 3 days ago I slept with a stranger, he seems clean and says he doesn't sleep around much and he's 37. His genitals looked clean and he used a condom but I am worried he might have something. The condom didn't break and there was no blood or anything involved but I am worried about the stds that are not visible... help

You just described signs that show he's clean and your worried? I don't get it ,but if it bothers you ask him to get checked out.

I said he looks clean but at the end of the day he is a stranger, I am just reading up on all these stds and it seems its hard to tell when you get something... I don't know what to think, obviously I;m not so experienced and had just a few partners... do I need to worry?

You just described signs that show hes clean and your worried? I dont get it ,but if it bothers you ask him to get checked out.

It sounds fine very unlikely you need to worry

One fooling around much means he only has two partners a day, You have no idea what he has, someone with AIDs will "look" clean. Only a few STD show up on the outside.