Hi Dr. I had an anonymous sexual encounter back in April with another man (masterbation/oral/anal fingering). Monday of this week, I noticed what looked like an ingrown hair on my scrotum. I FREAKED OUT!! Syphilis came to mind. I overreacted and took a 1000 mg pill of Azithromycin in the morning and one that night. Still freaking out on Tuesday, I googled more and saw where recommened dose was 2 grams in a single dose. I took 2, 1000 mg pills immediately. The chancre seems to be fading, but Im still freaking out. Will the amount of Azitromycin ive taken cure or stop any progression of any STDs? Im married and hope i have not unknowingly given anything to my spouse. This will cause a divorce for sure!