About bronchitis. why I am still tired and coughing?

started fever&cough 5/4/09. after a wk ,became bronchitis&wheezing.Ended up in A&E. tachycardic-132/mt ,bp-130/104.. Now finished 2 courses of antibiotics 1st-amoxicillin&2 nd-augmentin 2g-7 days.&and prednisolone 30mg-7 days.Still very tired.coughing(not very severe,but bringing up greenish sputum in less amount,bad taste in mouth etc.bp&pulse normal now. still off work,) any advice please?