there are many stds. and each one has their own "incubation period". needless to say if you had unprotected sex with someone who has an std you are at risk. find out what kind of std. or better yet get tested for all of them. use a condom next time and you won't need to worry.
std incubation period. i was with my usual partners within one week of coming into contact with a person that i believe has an std. what is the incubation period before i am able to pass along the std? could i have infected my usual partner?