I agree that doesn't look good, but when infections get really bad they will generally be lethargic and unresponsive, so there's still some hope.
I don't remember; are you giving him antibiotic shots from the vet or something? Just out of curiosity, are you going to a specialist herp vet or regular vet? The treatment sounds like herp vet, but I just wanted to be sure. You should give them a call and let them know the condition is getting a lot worse. They may want to do a culture to more specifically target the bacteria.