I am in the same boat. In my first week and sores galore! I called dentist today and receptionist said if not better on Monday to call back. Canker sores all over...cheeks, gums, tongue, lips, etc. Ridiculous! The side of my tongue has one long ridge of sore down it from the whole right bottom plastic. Everyone where I read and everyone I talk to say this will go away in time. I took an emory board and filed the edge dowon a bit and seems to help a little. Everyone says you rmouth adjusts...I hope so. And I'm so darn thirsty...some gum sure would help!!! Miserable but the end result will hopefully be worth it.