Does anyone have experience with SFQ for this common condition of awareness of heartbeat (with palpitations) when lying down?

Comment: I really need your help. That is because this causes anxiety, and worsens the insomnia I have long experienced. Often I get only four hours of sleep a night (2 hours of sleep, 2 hours awake, and 2 hours more of sleep. I'm then exhausted during the day.

According to Mayo Clinic, this is often benign. It is frequently related to stress. I plan to follow Zakyrus' suggestion to do Self-Concentration.

What are those of you who have this condition doing to cope with this? Please help if you can.