Over the holidays I had a fairly severe upper respiratory virus with lots of green mucus, coughing and blowing my nose. Went on a z-pack - really didn't feel a whole lot batter. After about 2 weeks, coughing stopped, not really blowing nose, still feeling run down and not quite 100%. Over this past weekend, my next and throat started to feel still and hurt. Now when I breath deep my chest hurts, when I walk it hurts and feels heavy, and when I lean over there is a throbbing. I went to the doctor on Sunday and was given cephalosporin and have taken for 2 days. Should I just wait it out to see if the chest pain is relieved? At what point would I return to my doctor?