I Feel As Like Its Hard To Get Air, Very

I feel as like its hard to get air, very weak, lightheaded, I feel like theres a pressure under my diaphragm.
I noticed it seems to improve a little with a bowl movement. I have congestive heart failure, with a 22% ejection fraction. It makes it hard to tell if this is related to the heart or not. I wake up about every hour gasping for air. Thank You