L.R.
I know I have my daughter's bed elevated w/ some 2x4's. I also have the vicks vapor plug in with a cool mist humidifer. I also put children's vicks vapor rub on her chest at night. I have also done Triminic (for children) and given her .5 ml. All that together seemed to help her.
Also, I have her on Enfamil Poly-Vi-Sol vitamins. That has helped her with not having colds for long periods of time or catching colds.
Hope that helps. I know it's hard, but it will soon subside.
Good luck!