Tony, in regards to your mouth opening only 1 finger wide. Thats called trismus or better known as lockjaw. Yours is a severly restricted opening, I know cuz mine is the same width. This is something that you will want to work on right away after you ask your doc. You will need to do exercises to help your limited opening. Stretch your mouth open as wide as possible several times per day and hold it for several seconds. It will not improve unless you work on it. Make sure you ask your doc about doing any stretching exercises before you start, you dont want to tear something that is still healing.

Im not a HPV expert like Brian or Davidcpa but I do know that a vaccine is not going to help. HPV means your chances of recurrance are less but it does not change how you are treated.

Here in the US, PET scans are usually done at least 3 months post treatment as long as there isnt swelling. That would give a false positive. Then we usually get them every 6 mo before it goes to yearly. Not sure how frequently its done where you are. With the big surgery you went thru, there could be swelling for over than 6 months.