Thanks for your help - it is appreciated.
Most canker sores are painful. So are almost all herpes lesions -- even more than canker sores. Sounds like you probably had something else entirely, neither herpes nor a canker sore. I won't even try to guess at other possibilities. This isn't an STD problem, so I won't have more to say.
canker sore with no pain?
Further information: A single sore inside the mouth is unlikely to be herpes at all. More likely a canker sore.
Starting with the title you chose for your question ("Is this HSV-2?") plus the first 3 words of the question itself ("In my mouth"), the answer is almost certainly no. HSV-2 of the mouth is rare.
Now I have read the rest. The symptoms of HSV and the appearance of HSV sores are identical, whether due to HSV-1 or HSV-2. It seems your doctor is pretty sure you have HSV. But because it is the mouth, it is extremely unlikely that HSV-2 is the cause. Not only is oral HSV-2 rare, when it happens it almost always is in association with a simultaneous first infection with genital HSV-2. Since you have had no symptoms of genital herpes, your oral herpes surely is HSV-1.
I don't understand the treatment with levofloxacin (Levaquin). That drug is totally ineffective against HSV. Your doctor must have thought you also had some other sort of infection; or you got the drug wrong (maybe it was really acyclovir, valacylclovir [Valtrex], or famciclovor [Famvir]?); or your doctor doesn't understand herpes after all.
Regards-- HHH, MD
it is the upper right side of the mouth