After starting radiation I was able to work as a full time as a Veterinary Technician for about 3 weeks, then my mouth got too sore if I talked much, so I worked part time the next week. After that I was having trouble with pain because even when not seeing clients I'd have to talk some, so I think I worked 1 day of week 5 and I've been off since. If I had a desk job where I didn't need to talk I may have made it all the way through.

Everyone on the internet, doctors nurses, etc all say it varies a lot from person to person, but I hope that helps!