I'll go to my GP. I'm slightly embarrassed about visiting him, because I get along tremendously with my GP and have approached him with relatively 'lighter' matters so far, and so suddenly appearing with the news that 'I have dots on my genitals (which may indicate my having an illness tied to a stigma') is a new thing. But I'll get over that for my health, I guess.
Again, many thanks for the advice. It's funny how 'prostitute' or 'escort' has certain extreme implications in society, and yet I can rely on this forum to give me balanced information and advice.