I get this weird scary thing that happens to me at night when I am trying to fall asleep from time to time. Usually when it happens, it happens three or four nights in a row. I lay down trying to fall asleep and all of a sudden it feels like my heart stops or skips and I stop breathing. It leaves my heart racing and a jolting feeling once I have felt my heart beat skip/stop. Before it happens, I usually start feeling this weird high sensation. I have had my heart looked at and the doctors saw nothing wrong. I have been diagnosed with severe anxiety and panic disorder. I am at my wits end about it because I strongly believe that I have a heart problem and that one night, it will happen and my heart with completely just stop. My anxiety stems from the thought of death, so the sleeping problem terrifies me to extremes. I am a 21 year old female if that's helps my situation, I just don't want to feel alone in what I have been dealing wuth at night. Advice would be greatly appreciated.