Coughing up mucus symptoms and conditions

I'm 18 years old and I've been taking Advair (500) for about 4 years. I've had very persistant asthma my whole life and my Advair seems to save me from having to use my albuterol around 6 times a day. About 9 months ago i lost my voice for over 2 months. After that went away I had a break for about one month then around 6 months ago I developed what seems like a smokers cough yet I don't smoke. I just got a chest x-ray done and they said it was normal. They put me on steroids and antibiotics but it doesn't seem to be helping.

Could it be the Advair? I don't know that I can go without it even if it is. I want to get rid of this congestion in my lungs. I'm sick of coughing up mucus daily. Does anyone have any advice?

I have been on Advair 250/50 for approx 4 yrs. I am 47 now. I Know I have to take the medicine for my COPD every 12 hrs. If not, I have difficult time breathing. I had leg cramps in the beginning, but not too much now. The problem that is most bothersome now is low back pain. Not sure if I have osteoporosis setting in, or it is just a side effect. I am always coughing up mucus. My shoulders, arms, and legs, are very sore to the touch. Feels like someone has come up and slugged me, and that is just from a finger touch.
I know I cannot get off of the Advair, If does help my breathing, but I also know the consequences if I do not take it. Almost like my life line.
Does anyone else feel this way?

I have been coughing up mucus since I started taking it.