About a week and a half ago, I received unprotected oral sex on the penis from a prostitute not knowing that certain STDS can be transmitted through oral sex. I then noticed on the 4th or 5th day after that the bottom of my Anus was puffed out like a pair of lips but the top part is fine.. There's no discomfort unless I squeeze my butt muscles and the discomfort is very mild. There is no itching at all. There also appears to be a small amount of a yellow substance when I wipe in that area. The last time I checked it, it didn't look red or discolored. Idk if this is hemmerhoids or not. Should I be worried? Please give me some advice about this