I am willing to bet everything i have that you will be negative.
I, on the other hand, could possibly be positive :(
You will not get HIV using a condom. Safe sex = No HIV risk
While having other STD's increases the risk of HIV transmission, you can get HIV all on its own.
You don't need to get tested.
Since you are so paranoid about your protected sex encounter, maybe stay away from sex workers in the future?