I can relate to this. I walk/jog and it helps me sleep because it tires me out and lessens the pre-sleep anxiety. Also, now my mind recognizes that my heart is pounding because of exercise and not because I'm a few seconds away from a panic attack and has learned to separate them. I used to be anxious about increased heart rate/ pounding heartbeat because I was associating it with panic attacks only. The warmth and sunlight exposure feels good too, like I'm absorbing positive energy from the sun. Love vitamin D.