I have had a dry chronic cough for over a year now. The cough will subside & then start back up again. For the last few months, I get severe headache pain after coughing. I treat with a Chiropractor & get regular massages but when I cough, it's as if I have received no treatments. I have tried Delsym cough syrup and over the counter sinus medicine with no change. Do you have any recommendations?