I had bronchitis for two weeks got better but thought I swolllowed a piece of meat in my lung.paniced and have had a cough for 4 weeks now read stuff on the internet and stopped eating dairy and coke cold turkey .afraid to eat these as I think they make me cough and clear throat. lost 27 lbs not eating much. doctor gave 0.25 Xanax would this turn things around or is it normal to have a cough last this long after bronchitis.