Planned parenthood visit.

Out of hopes to save a dying relationship, I made the mistake of having drunken unprotected sex approximately two weeks ago. He swore he was clean and he swore he pulled out in time, but if he lied when he promised to use a condom, I decided it was best for me to go get tested. 
In about 20 mins I will be getting pregnancy and STD tests at planned parenthood. What can I expect? I'm so nervous to have someone go down there because I feel so violated because of my ex... What exactly are they going to do? How long do I wait for results?
I won't be able to live with myself if I'm positive for anything... I have so learned my lesson so I pray for all negatives.