Have chronic cough with phlegm, taking prednisone, started using echinecea herbs and essiac with cat claw, went from 50 mg of prednisone to 15, then had gum infection, cough started back, took two tablespoon of ACV and phlegm/cough got worse, back to 50 mg prednisone and still coughing with phlegm, why is that when other posters states ACV reduces phlegm? Any other natural remedies for reducing phlegm?