Almost 6 days since dx w/pneumonia, starting antibiotic.still have 101 fever,severe cough w/phlegm,chest/back pain.is this normal?

Pneumonia : If it had been 6 days on antibiotics and you still have fever, you should probably seek medical attention and change antibiotics as something is missing being treated.

Not normal : It sounds like you need a re-evaluation to make sure a complicating feature to this infection isn't at play or that there isn't an alternative diagnosis beyond just an uncomplicated pneumonia.