You said you shaved and had razor burn. Why wouldn't this all be that and not herpes?
If the area had little (or no) contact with, the chances that this is herpes is zero. Chances of you getting symptoms this much later is even lower.
You need to let this go. We've been over this. Get some counseling. You deserve to find some peace.
The area that is tender had very little contact to other persons genitals.