Hi @penn, You might want to read through the following discussion to see if it's similar to what you are experiencing.
--- Has anyone experienced internal vibrations?: https://connect.mayoclinic.org/discussion/internal-viberations/

@penn, You reminded me of a time when it seemed like every night, I had a body jolt in my hip area that almost lifted me out of bed. It wasn’t painful, but just one weird spasm as my body was getting near sleep. It went on for at least a year and I couldn’t figure it out. I also have no idea how it stopped, because until reading your post, I didn’t realize it no longer happens! I hope yours resolved soon!