Why do I feel like I'm suffocating when I am exhausted?

I have asthma. But I don't think that's it because all I have to do to breath normal is calm down. What happens is like after a wrestling match, I come out gasping for air, and my throat closes as if somebody is squeezing my windpipe until I calm down completely. My eyes tear up like crazy and it feels like I'm crying but I'm not really. what causes this? Adrenaline crash? Like what's happening physically that causes it?