What can I do for my sick child?

Does anyone know of cough suppressant that ACTUALLY freaking works. My poor baby just threw up every where from coughing so much and I’ve done EVERYTHING. Vicks, steam bath, allergy meds, cough suppressant, honey. he’s had it all the last 3 days and NOTHING helps. He has a drs appointment tomorrow but I feel so bad for him. Especially since he can’t blow his boogies, he don’t get the concept yet. Not to mention I feel like death my self, fever of 102 right now with a sick kid and hubby ain’t far behind. Ahhhhhhhhhhhhhhhhh I hate being sick.