Tomorrow I go in for my stress test to check my heart. The cardiologist is almost 100% sure I don't have heart problems but he wants to be thorough. They are going to make me run on a treadmill. I am super scared I am going to pass out in the doctor's office. As it is, I am forcing myself to do 20 of brisk walking in the evenings, and by the time I get done I am super short of breath and I feel like collapsing. I can't even walk up one flight of stairs to my apartment without being out of breath. I am really worried I won't pass the test tomorrow. I don't want to faint. Wish me luck!