From your description, these sores do not seem like a symptom of a herpes outbreak because it sounds like they are occurring in different areas of your mouth at the same time over an extended time period and haven’t gone away.  It would be advisable to go back to the doctor if your symptoms have continued. To rule out HSV, they can do a herpes swab if they think this is necessary.  If these are canker sores, they will go away by themselves and need no treatment. Canker sores can be caused by many reasons, including acidic or spicy foods, vitamin deficiencies, hormones, stress, injuries to the mouth and autoimmune disorders.