I am suffering from cough from past 2 years.At this stage i get a feeling of suffocation which led to my cough because it is not a regular cough it just arrives time to time especially in nights when i went to bed for sleep around 12-1 am. Before sleeping the whole day will went like that i am a healthy person but in nights it leads to cough,vomiting,sometime blood clots in vomiting,i have had 2 xray of my lungs but nothing has found and i also went to ENT department for throat infection.