When the girl u slept with most likely have some sort of STD, do to her lifestyle, u start to immagine STD symptoms eventhough u don't have it.
Yes your paranoia will cause you to feel that way. The best thing is to get yourself checked. there are many free clinics around most towns . Like family planning. But I would say the best thing is to not do anything with someone that's slept around a lot. You should also wrap your meat every time you put it in. You never know because the person may not know and then you got it. And also some women have some kind of std in there mouth so got to be careful there also
The first answer pretty much answered your q.
anyway
Don't be silly, wrap your willie.
and
Wrap it, before you tap it.