I Have Severe Asthma. I Take Prednisone Daily, Advair 500/50,

I have severe asthma. I take prednisone daily, advair 500/50, nebulizer 3x's a day , singulair, flonase, ventolin, also i take norco 10's and flexeril for joint and muscle pain caused by steroids. I also take claritan, pepcid. I been diadnosed with sleep apnea, depression, and axiety, Why can't i get disability with all these conditions