my son came home from school today crying his throat hurt when he swalloed. he has no other symptoms except a little stuffiness. i gave him childrens chewable tylenol. he was fine for 2 and a hlf hours. now that its wearing off, he wants more tylenol. i dont know what else to give him. hes eating a popsicle now but that is only temporary.. whjat should i go buy over the counter??