I just walked to the shop which is only about a 20 minute walk. When I was walking back home I looked at my apple watch and my heart rate was 154??!! I have been diagnosed with anxiety but have not been anxious for a while. I don’t smoke, exercise every few days and I’m only 25f ? As I got home my heart rate went down to 89 within 10 minutes. Should I be concerned or is my anxiety causing this?