I am having a hard time breathing especially when i lay down at night, it started when i start walking for one hour everyday and now i am to tried to do what i was doing. Just making my bed or coming up the steps is a task for me now. I smoke for several years and has made a stand to stop and i have, have destroyed my heart now that i am trying to take a turn for the best.
Thanks for your question on Chat Doctor. I can understand your concern. By your history and description, possibility of congestive heart failure (CHF) is more likely.CHF is common in smokers and known to cause breathlessness on exertion and orthopnea (breathing difficulty in night in lying down position). So better to consult cardiologist and get done blood pressure monitoring, ECG, 2d echo and stress test (trade mill test). You will need diuretics and other cardiac supportive Chat Doctor.  Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.