Hi E,
Feel better soon! I'm a chronic sufferer, especially during Christmasy time and Spring time. Its not fun being sick and feeling like you're coughing and wheezing your entire lungs out. I can't tell you what works, but I find I must always have a humificator sitting next to my "sick bed"
Also, Living Air has been a miracle... It freshens up indoor air, which can be a lot healther. I got two of them at my house (need to get one for my apartment). Yes they're costly but is worth it for lifetime.