you can contract std's from oral sex but overall the risk is very low. in general we don't even recommend testing from them.
in the future, protect yourself and only give and receive protected oral sex - saves you worrying,saves you testing and protects you!
grace
Oral sex is pretty safe your main worries are gonorrhea which almost always produces noticeable symptoms within one to two weeks. I'd recommend getting tested to be on the safe side but without any symptoms chances are you're STD free.
Sorry, I missed in the first line it was only an ORAL unprotected sex only!...