I have gotten cold sores before I ever received oral sex or had sex vaginally.
You said you rarely see herpes on the testicles however I see that it is a common site for it to appear on other sites such as planned parenthood.
You said it could NOT be herpes but what else could it be? I understand how the single blister could be confused with something else. But this recent time presented as a cluster of small fluid filled blisters. They appeared in rather quickly, nothing that i noticed in the morning when I woke up and by early afternoon they were there. Never had any prodrome and never get them for when I get cold sores for that matter. The Valacylovir seemed to work quickly.
I don’t know whether I need to disclose anything except the cold sores at this point. I am planning to continue 500mg per day of Valacyclovir either way