Is Sore Tongue And Enlarged Papillae Accompanied By Intermittent Feeling Of Congestion Likely To Be Cancer?

Question : I have had a sore tongue and enlarged papillae accompanied by an intermittent feeling of congestion or "foreign body" in my throat for 3 months now. The tongue soreness and enlarged papillae are always on the sides of my tongue near the back or base and over the past 3 months they have alternated from left side to right side several times and varied in intensity from mild to very painful. I have been a smoker for years. I also drink coffee every morning. I noticed the pain intensified after drinking coffee and smoking so I stopped. After more than a week of abstaining from coffee and smoking the pain and enlarged papillae reduced slightly but not significantly and not permanently. Curiously, after a heavy relapse of smoking and binge drinking, I had 2-3 days of complete relief where all pain was gone and no enlarge papillea. They both returned about a week later and have continued to persist. My doctor (PCP) does not see anything wrong and the prescription grade antiseptic mouthwash he prescribed is not helping after 2 weeks of use. My dentist did not see anything wrong or unusual upon visual inspection. How can I get this diagnosed and treated? What type of specialist should I see? Do I need a biopsy? Does this sound like oral cancer?