By all means, get the biopsy. Mainstream medicine is quite good at diagnosis. If, heaven forbid, you do have cancer, stop smoking and come back here and let us help you get rid of it. Mainstream medicine really sucks when it comes to treating cancer and other serious illness.
Come to think of it, stop smoking period. Most reputable dentists will not perform implants unless the patient has quit smoking for at least six months (smoking really retards healing, especially in the gums).
Get some colloidal silver and gargle with it before swallowing. Get yourself a colloidal silver skin bar and use it and a toothbrush to brush your teeth and gums. That may well get rid of your white spots in time, and it is wonderful for getting rid of plaque and gum disease. The best source (the ONLY source of the skin bar) is CureZone sponsor Utopia Silver (scroll down to the bottom of the page and you will find a link in the sponsor's box.
Good health to you,