why is my heart rate not slowing down so i can sleep? when i lay down to sleep i can feel my heart beating. it isnt racing but it isnt slowing down to rest either. my usual heart rate runs about 65-75 daily. at night my heartrate has been about 75 and doesnt want to low down to its usual of about 55-60 to sleep. this started a week ago . i even eliminated caffine from my diet about a month ago.