For about 10 yrs I've had a dry cough and nva thought nothing about it. Sometimes I would cough so bad to wear my lungs would kinda hurt. Now just about a year and a half ago I noticed my chest would spasm. Its weird feeling but no pain. It usually happens at night when I'm trying to sleep. It will happen out of nowhere and it scares me. I been to er several times and they ran blood test. Ekg. And evn had me do a walk test where I ha