Smokers cough 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?

Oh My! I've been taking this durn drug for quite sometime. Have had what sounds like "smokers cough", PCP told me I had asthma & COPD, got put on steroids & gained excessive weight, not been able to rest well even though I've slept 8-10hrs., feel so tired by 1pm each day, stomach goes crazy, feel like there's something extra in my abdomen. Have been off this drug for several weeks now and here's my findings:
Not coughing, no tickle at back of throat like there's a hair there, sleeping better, not feeling so tired in the early afternoon & don't feel as if someone keeps hitting me in the stomach. After reading what others have written here, draw the conclusion I'm not crazy after all. Thanks All!