Hi, Kary.
Follow through like the others suggested. If you want peace of mind, ask for a biopsy. It's the only way you will know what it is, and what it isn't. If he refuses to do a biopsy, a second opinion is a good idea to cover all of your bases. Also, since it is in an area that is rubbing against the back of your mouth, that's another reason to get it snipped off.

Best of luck with your follow up and I hope it's nothing but an irritation/swelling as suggested. Like David said, please keep us posted and we are always here.

Best wishes,
Kerri