Welcome to OCF! Many oral cancer (OC) survivors have been thru what you have described. The late side effects can be debilitating! Im sure if you spend some time doing a quick search of our posts and reading thru posts you will find many similarities between what you have been thru and what you find others here describe. Please read the very first post (titled .... Posting Etiquette) in the first section where it says START HERE. The section is named ("New Here, Read This First) take some time to read the Posting Etiquette to quickly learn the ins and outs of how our forum works. After reading that entire thread you will better understand how/when/where to post and lotsa of little pointers. This may not seem important but it really is very important to create your own new post and avoid posting on old threads which only confuses other members and can disrupt replies other members who could be seriously ill not get the help they need. Im not quite sure how long ago you finished rads? It takes an entire 2 years for OC patients to recover from rads. The better OC patients do with their intake the easier they will have it. Every single day patients should take in at least 2500 calories and 48-64 oz of water. It sounds like a TON!!!
Its really not that bad considering how OC patients burn calories at a significantly increased speed. Its not easy but it definitely does make a huge difference in your recovery.

Best wishes with everything!!!