Most of us would tell you that the mouth takes a long time to heal - much longer than say, a laceration to your skin elsewhere. That's part of the reason why it can take literally months to heal from 7 weeks of radiation, AFTER the radiation is over. My tongue surgery (and 7 weeks subsequent IMRT) was 3 years ago and my mouth is still very tender to this day in the area of the surgery, especially sensitive to spices and such. I used to love spicy food, hot sauces, etc but now I can't eat any of them because it's still so tender.

Sounds like you'll be seeing the doctor shortly - hopefully he'll look at it and tell you it's just a matter of 'normal' healing process for you. Hang in there!