Chance of contracting herpes

3 weeks ago, I had very brief unprotected sex with someone that I know of, but don't know personally. He didn't orgasm, and neither did I. He was only inside me for maybe 30 seconds. If he had herpes, what i the chance that I contracted it from him? He had no visible sores or scars.

It's too early for me to get tested, and I'm just trying to get a general idea of my chances. Any help would be greatly appreciated.

Thanks.

[gracefromHHP]

ejaculation has nothing to do with std risk - just a fyi.

this is a low risk encounter. it's up to you if you feel it's worth testing for any std's in general from it.  

grace