T.O.
It's so different for each kid. My 2 year old had it and it hardly bothered him at all. He was pretty crabby, but other than that he seemed to handle it well. We gave him lots of jello, pudding, popsicles, and ice cream...Anything cold seemed to make him feel better. Our Dr. also said to mix benedryl and Maylox and dab it on the sore spots in his mouth to numb them. It lasted for about 4-5 days for us, but again he seemed to have a mild case.
Another child had it as well and he was miserable...and his mom got it too. High fever, crabby, wouldn't sleep or eat much. The mom said it was awful for both of them when she came down with it.
Each child reacts so differently. Sorry if I wasn't much help, hopefully some cold foods will help. I also remember the Dr. saying that baths help too. Good Luck!