I am currently taking advair and I feel horrible pain in my chest...

I am currently taking advair and I feel horrible pain in my chest. I am having a hard time breathing and feel as though I am not gettin g enough oxygen to my brain. This is only my third or forth dose of advair. The really bad chest pain is when I cough. But I still feel the achiness without the cough. My muscles in my back hurt as though I have been lifting a ton of weights although I have done NO strenous activity. How long will this take to wear off?