Take his advice: Go to Shands. Here is the link for the head and neck cancer specialists:
http://www.shands.org/hospitals/UF/service/cancer/headandneckcancer.asp Call the number on the page and explain your situation -- the person you talk with will make sure you get seen by the right specialist. Check to see if you should bring your biopsy report and slides with you for that first appointment or if you should send them in advance.
Given your level of concern, it would probably be a good idea to get checked at Shands (or at the University of Miami, if that is closer) even if the biopsy is negative, since the doctors there see far more cases in a year than your GP probably has seen in his entire career.
-- Leslie