Nothing you can do after the fact.
the odds that you contracted a std from this are pretty low overall. I really don't recommend any routine testing unless you get symptoms.
If you know you are going to worry, only have protected oral sex in the future.
grace
what are the symptoms i should expect jsut incase something happens.
I have a sore on the left side of my mouth(where the upper lips meets my lower lips). Can that be a sign of herpes. It started the next day. Just to let you know, I never gave the guy oral sex.