I can relate to these symptoms a lot, I experienced all of them and more when I had my run-in with Health Anxiety last year. I can especially relate to that feeling of being spaced out and tired, but also energetic at the same time due to all the adrenaline going through my body. I also experienced that sort of 'auto-pilot' feeling, it felt like I was constantly inside my own head too busy thinking and worrying about stuff, and my body was on auto-pilot. I even disassociated from time to time, which is where your mind and body seem disconnected, almost as if you're watching yourself in the third person.
You are not alone in feeling the way you do, everything you described can be and probably is caused by anxiety, stress, and the constant supply of adrenaline in your body caused by this anxiety and stress.
All the best.