The thing is - I noticed that my tongue has no sense of feeling. I mean a little but say you have a tooth rubbing against it, chances are you won't feel it to the extent your normal tongue would. It's possible that this is the cause. OR some situation similar. I am a non smoker and non drinker. But I did have a tooth that wreaked havoc on my tongue for years.

You're in Ontario? Toronto? If so Jonathan Irish at PMH is THE BEST. He did a hemiglossectomy and my tongue behaves almost normally. I can speak without a lisp etc... His Plastics guy is amazing.

He's the foremost Dr. for this type of cancer in Canada.

I agree on the surgery. Just remember sometimes cancer doesn't show up in the nodes immediately as it is microscopic but it may pop up after. Chances are after having had the neck dissection you should be okay but it has been known to jump sides. Anyway best of luck...
(BTW - I'm in total denial about the weather so I'm completely ignoring your comment. !!!!)

hugs