Nov 30, 2016 Anyone ever had this shit? Just got diagnosed with it. Few weeks ago I started feeling like I was going to die after doing cardio 2 miles on the treadmill felt like a full marathon. They want to prescribe prednisone but I said fuck that shit. The doc said they don't know what causes it, there is no cure, and it might go away... wtf. Anyone else ever go through this?