Continous wheezing, itchy sensation and use of rescue inhaler?

So I've been having continous flare ups and wheezing for a few weeks now. I've come too using my rescue inhaler a few times a day worst being at night I always wake up with asthma. I am also getting the itcy lung and back sensation which I get once in a while when I flare up. I went too my GP this past week so he can listen too my chest as I've been feeling that I have bronchitis which I've had this experience before. When he listened he didn't hear anything too abnormal and wassn't able too make a clear diagnosis but still gave me an antibiotic script which i haven't yet filled in it's got worse over a few days and now decided too go fill it in. Any advice?