I think you should push to have a CT and/or MRI ASAP... Be seen at a top cancer center. Moffat is supposed to be awesome. Usually the treatment for this is surgery... as it's LIKELY not HPV related. Even if they suspect that it has not spread to the nodes, this type of cancer can be very aggressive, and there could very easily be microscopic cancer in the nodes (this does not show up on a CT or MRI), so if they recommend a neck dissection then I would go with it. The surgery is nothing compared to radiation. It's a big surgery, but recovery usually runs 10 days to a month (being able to eat and speak ok) Also if after surgery they say you're cured (assuming they do surgery - which they should) keep a very close eye on your neck and mouth and at the first sign of anything unusual (non healing areas, and or swollen nodes) high tail it back to the dr. ASAP.
This cancer as I said can be aggressive. Throw the book at it from the start. Too many people are caught behind the 8 ball after the fact.

Eat up now... ;o)try to gain some weight. Hugs and best of luck...

Most importantly I will reiterate - go to a CCC if you can!