Cant really breathe that good?

I used to smoke grits for 4 years so I have no doubt that is one of the reasons (I quit 2 months ago) Anyway, I cant really seem to breathe right. I have to take slow deep breaths and when I do that it feels like I didnt get enough air that I needed. When I try n fall asleep its killer! I have to lay there and basically hyperventilate until I fall asleep.....i sleep right under my window so that kinda helps. I was diagnosed with exercise-induced asthma 6 years ago but I really believe that i am passed that. I have to breathe through my mouth instead of my nose cuz it feels like its ALWAYS clogged. i get shortness of breath really easy even when i just walk around the park when I come back my lungs hurt so much i have to hold my breathe for a moment just to regain my abnormal breathing. what is wrong with me?