It sounds most like a generalized anxiety disorder but there could also be some OCD in there.
Sleeping
sleeping isn’t a cool down excersise, because you should still be physically active and sleeping isn’t one of them.
Prolonged bed rest, Pregnancy, Decreases in blood volumes, Certain medications, Heart problems, Endocrine problems, Septic shock, Anaphylaxis, Neurally medicated hypotension, and Nutritional defiences.
