Vicks Vapor Rub is an old, old remedy which helps many people. After Momma gently rubs it on the chest, be sure the little one is well covered up in warm pajamas with t-shirt underneath. (Unless she doesn't like the smell of Vicks. Most children seem to be comforted by it. But don't force it if she doesn't want it.)
If you never allow soda, this would be a good time to offer ginger ale. The unusual treat might get her to drink a little more. Also, lots and lots of popsickles - the cold seems to sooth the sore throat.
Saltine crackers, goldfish crackers, any cracker she might nibble.
Ice cream - any treat that she wants, to keep her eating.