About 6 weeks ago I had a possible exposure to stds. I had protected oral sex with a prostitute but touched her vagina and then masturbated. I had not had any sores that I’m aware of but I have had slight discomfort in my testicles and tip of penis as well as a small amount of itching all over my body which I don’t know if it’s due to an actual std or stress and anxiety. I went to a dermatologist and had him check out a couple small sores on the inside of my lip. He said he doesn’t think it’s herpes but it does resemble some type of viral sore. If this is herpes why would it show up on my lip on not my penis where the possible exposure was? Also, if I had an outbreak wouldn’t it appear on on my genitals and lips at the same time if I did have hsv? Any insight is greatly appreciated!