iv had a feeling of breathlessness for the past 2an half years now constanly feel the need to yawn and some times im unable to wich leaves me breathless seems worse round the time when im due on i cough up clear sticky stuff and have a tight feeling in my throat sometimes this breathlessness feeling is worse than others im a little worried as my gdad has just died from emphysimia an copd iv heard it could run in families iv had test done for asthma an they are normal