You have acute guilt, not HIV. Please consult a doctor whose discretion you can trust, let all your concerns out, and get the reassurance you need. If the doctor thinks that testing you in a few months is worthwhile, just to make double sure, that's fine, but leave that decision to the doctor. And for your own health and peace of mind, please follow your own advice and stay away from risky business.
Take care.
Dr. Rockoff