Hi. Ive had a sore spot on my throat for 3 + months, starting at the base of my tongue. It has spreat to the other side of my lower tongue, and now my tongue is burning/numb on the l left side. I did a taste test, and I cannot tell what is being put on that part of the tongue. Other syymptoms: fatigue, coughing, etc... Is it possible I have cancer?