None of this stuff works!!! I tried quite a bunch of this kind of stuff and none of it helped! My 4yr old son has had a fever (101-103) for 6 days now. I've been to the emergency room with no success either. His white blood cells are immature and high for normal standards. We had a u.a done and an x-ray on his lungs. None of these showed any problems. He has a cough that has become hacking and coming up mucosa. He has post nasal drip... none that is yellow or green. All clear. But coughs up whit/ yellow Flem. X-ray on the lungs showed nothing. WHAT is WRONG here?!