Mark,
I agree with the others as well. 3 weeks is a long time to wait for a biopsy. Unfortunately we Canadians have for far to long sat back and let the Medical Profession tell us how busy they are and that is the best they can do. You could nag them or tell them that it is causing you great discomfort and has become increasingly painful. Or be assertive and tell them that you want it done sooner. You might want to do what I did to find out what the hole in my tongue was. I had my family Doctor refer me to a Dentist that was willing to do the biopsy. After all that is their area of specialty. It took me 2 days to get in and 1 week for the results to come back.
David