I started a similar link back in 2020 because I was having vibrations just as a was falling asleep and just as I was waking up. For the first several months they really scared me and I was nervous even about going to sleep. Over time I found the less a worried about them and realized that they seemed harmless, they continued but not so strong. Now when I feel them I just know I have entered the stage of falling asleep, stay calm and go to sleep. Mornings aren't so bad because I am getting up and they go away. I have had them everyday since 2020. I have excepted it as a permanent feature of my sleep cycle.
Have having read tons of messages with all kinds of different histories, medications, ages, sex, and medical conditions I have not seen any common factor emerge to explain. How this helps.