How Can cough And Fever Along With Fatigue Be Treated?

I have had an ongoing (3-4 weeks) wet sounding, hacking, non productive cough, low grade temperature 99.0-100.5, generalized aching, extreme fatigue and a raised rash on my chest. I tested positive for the flu and mono in the office. Lungs were coarse with expiratory wheezing. chest x-ray was negative. My doctor is treating the cough with an albuterol inhaler and tesalon pearls and a penecilin shot in his office 2 weeks ago. Symptoms seemed slightly better after a week off work, but now back to full activity they symptoms have fully returned. I do have horses and am frequently in the barn caring for them. My day job is in the ICU unit at the veterans hospital. Any advice something I should check out?