Diagnoised with acid reflux and asthma recently. Have had a cough for over a year. Severe bone and joint pain started but arthritus test came back neg. Started on Doxcycline twice a day for 21 days. and pain is much better but it's still there. Over the past year the only time I feel ok is when I'm on an antibiotic. Do you have any ideas where to go from here?