Welcome to the group of people who wish they were anywhere else. The good news is there is plenty of hope for you. I'm speaking to you 20 years out from my ordeal. My situation was similar, a small tumor on the base of my tongue was discovered after I noticed a pea sized lump in my neck. Treatment was no picnic, but I've learned to live with most of the inconveniences that developed afterward. There is plenty of information here to help with symptoms you may develop. The one that caught me off guard is baroreflex failure that developed a decade later. I suggest you monitor your BP for any changes. I'm sure they've improved treatment since my time, so I hope you have a speedy recovery and few aftereffects.