Trachea still congested

Patient: I am 60 years of age on blood pressure medication.I am having a congestion problem. I cough up phlegm but my lungs are not congested and my sinuses are not congested. My trachea is tender, but not restricted. I thought it may have been bronchitis but there is no wheezing. I saw a doctor and was prescribed antibiotics.It cleared it all up but slowly it seems to be returning.