I'm no expert, but it sounds like you've had this for too long for it to be herpes.
My general understanding is that herpes goes through a cycle (bump, blister, open sore, scab, heal) which completes within a week or so.
Then,there would be no symptoms for a couple months or more until the same process happens again.
It also sounds like your skin lesion did not respond at all to the anti virals that you took for herpes (and I assume you took them as per the instructions) which would also go against herpes.
So, both Bumrungrad and the Institute of Dermatology said yeast and they even did a test to confirm it?
That sounds pretty conclusive.
Did the antifungals help?
I am failing to see the problem here. Why are you still searching for a doctor?