I had the same issue. It was because of unresolved stress. I would wake up with slight palpitations and a lot of thoughts and feelings and concerns in my mind.

I had the same issue. It was because of unresolved stress. I would wake up with slight palpitations and a lot of thoughts and feelings and concerns in my mind. I resolved it by regularly going out of my home, leaving my phone behind and "doing nothing" at a place where I can sit for a long period of time without being disturbed. Over time a lot of stress builds up in your body that if not unwinded will add up and create a self-feeding cycle of stress-nosleep-stress-even less sleep. Until you are in a burntout situation. I find that sleeping of its own will not unwind your stress. It is not hte reset on all stress and full rest. You have to take time to let the mind wander. This activity took almost 5-6 hours of doing nothing for it to become complete and for me to come back to normal. When I say doing nothing. I don't mean not doing something productive. I mean not fiddling with the phone. Not talking to someone. Not taking your kids or partner for a walk. Not taking your dog. Nothing. You literally have to do nothing and resolve to let your entire body and mind rest. Only then will the mind and body allow itself to rest. Ohterwise you will be stuck in this unending barrage of activity which your body is starting to burntout from.