Help! Out of control asthma.

Alissa
I'm 10 weeks today and I have been fighting with uncontrolled asthma for the past 4 weeks. I went off my Advair before I became pregnant. I'm having multiple attacks a day and can't sleep. I've been using my nebulizer every 4 hours and profit in between. I'm so weak I'm not sure how much longer I can do this. Has anyone used prednisone or advair while pregnant? I'm worried about what this may do to my baby? Any advice would really help. Thanks!