For a little guy like yours, when he is nauseous little sips of believe it or not coke or 7-up, preferably warm and some that has been opened for a while to let some of the carbonation leave, will help to calm his stomach.
Many times just plain aspirin will help bring down or break a fever much faster and better than ibuprofen.
Also, when he eats give him more broth and less of the rest of the chicken soup. Saltine crackers (as I am sure you may remember from 'morning sickness' days, lol) help with the nausea also.
Prayers and good thoughts still heading North.
Love and hugs,