Hi, I just had protected anal sex (I was insertive partner) with tranny sex worker. I wore a condom the whole time, BUT I noticed I have a light red rash/sore on my penis shaft that may not have been covered by the condom the whole time. It's not bleeding (looks more like a friction rash), but I'm worried if the worker is positive, perhaps HIV could pass through this red/sore area on the penis shaft. Please help! Should I get PEP to be safe since I don't know the status of this sex worker?