COVID “Long- Haulers”

I got real bad sick before we knew what COVID was. I spent two weeks in the hospital with it. At the time all they could say was we know you're sick, but we don't know what this is.
I'm still having issues catching my breath.
I can walk on flat ground for awhile, but after about 2 miles, I'm done. It took me a long time to get to that.
Hills or stairs gas me out quick.
I didn't have any taste or smell issues, but I still get the rapid heartbeat and trouble concentrating.
I'm well over two years now and it's not sure it's ever going to go away.