Hello,
It is very less likely for herpes sores to present inside the mouth except in children. You should get a culture sensitivity done of the oral lesions to check whether they are viral or bacterial. If bacterial infection is confirmed then you need a course of antibiotics and if it is viral infection then you need antivirals.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.