Gee, Minnie, when we were emailing in May and June it seemed that you were healing and it sounded like the sore was going away.
I was so sorry to read that you have been going through such mental anguish over this. I can understand why you want to get the biopsy done. Are you seeing your ENT or the dentist next week, you said your regular doctor?
I don't think you've mentioned why your upper denture is no good, but as Mike said, getting a functional denture up there, will help a great deal to solve the problem of your tongue rubbing against the lower implants.
As always, feel free to call me or write, if that is easier.
Jerry