I've been having a bad cough whenever I have anxious thoughts. It has started to hurt my head too. I've had coughing issues before for many years. Went to to doctors several times and was told it was asthma, but I ended up testing for asthma and it came back negative. Something strange I noticed, is it does tend to happen when i'm "lazy". I'm on winter break for school at the moment and in between jobs. I'm not really busy and I noticed time like these is when I get the cough.