Ive never even dreamed of having anxiety but lately getting in bed has been hard. I get in bed and i can feel my heart beating. Cant tell if its actually speeding up or not but can definitely feel it more. I also feel like i cant breathe and my chest feels tight. Went to the ER and they said i was fine. I got blood work, ekg and a chest xray. Still fine. A nurse said it might be anxiety but i only feel like this when I lay down. Anyone only feel it when they lay down?