I keep getting these 10-20 mins of coughing fits and it feels like I can't catch my breath and I will cough a little bit of thick clear mucus but when I don't have those coughing fits my cough is dry with no mucus. I also get this tickle in my right rib cage when I'm coughing. What can this be, I don't think I have a cold and I don't have asthma. I don't smoke either.