This does not sound like any sort of STD, or for that matter any infection at all. I think a lot of your symptoms are anxiety-related, and the stickiness may be from oozing tissue fluid that almost always means chronic skin rubbing. Is it possible you are rubbing the area a lot, because itches?
What you need, I think, is a dermatologic consultation. Share your specific concerns, get definitive diagnosis and treatment, and then get on with your life, as I am confident you will.
Best.
Dr. Rockoff