Hi there... okay so a plan of action is needed. You already know what you have to do so I am not going to continue to beat you over the head with it. Smoking is an addiction like any other and a very hard habit to kick. It's readily available, and nicotine makes you both, behaviorally and emotionally dependent, and is also physiologically addictive.

Beyond that you need to see an ENT. You have a wealth of symptoms do they mean oral cancer? NO. Could they? yes. However, the collection of symptoms really only muddy the water. Smokers oral cancer is often found in the mouth, or throat. HPV related oral cancer is often base of tongue (down your throat) or tonsil. Cancer often has a primary, and generally the tumor grows in size insitu and spreads out, and may then spread to the nodes (usually indicated by firm painless lumps visible or palpable on the outside of the neck. But for the amount of involvement you describe - throat, ear, tongue etc, it would be highly unlikely that it was cancer, more likely severe irritation, of infection caused by smoking or something else.

I'm not saying you don't have cancer but what you describe is very defuse. It's possible you have an area that might be a tumor, but most people who have it all over the area you describe would be on their way out by now. That said DO GO SEE AN ENT - someone who is an oral cancer specialist - not all ENTs are made the same.

Hugs and good luck.