I Am Having A Abnormal Heart Beat While Laying Down
Can be different reasons.
Hello dear welcome to Ask a doctor's service.
I read your query and here is my advice.
The palpitations you are having at night possibly can be present even during the day but when you lay down in silence you can hear them more.
Caffeine, nicotine and other stimulants may be a cause of them.
You may need also to check your blood count for anemia and thyroid hormones.
If the test results are normal then stress and anxiety may be a reason for it.
Hope I have answered the question.
Let me know if I can assist you further.