genital herpes (HSV2) generally are a cluster of fluid filled blister...On the mouth region you can get just one sore but there is no mistaking that you have a cold sore when its herpes (HSV1).
in addition, herpes would not go away with fungal cream.
I'm lost as to what you might have, but you should see a dr. for sure.
I wonder if you are using the antifungal cream sporadically. If it is resolving with the cream, try that again and use it for at least a week after symptoms have disappeared. You might be starting to cure it, but maybe you aren't totally curing it.