For the past year I have been experiencing an intermittent "buzzing" sensation that feels like it's coming from inside of my body (as if someone attached a cellphone to my tailbone). I thought that was weird enough, but over the past couple of months I have now been experiencing what feels like an external shaking sensation lasting about 10-15 seconds on days that the internal "buzzing" is particularly bad. Usually it starts with one swift "kick" (as if someone ran into the bedpost/couch that I'm lying on), followed by what feels like an external coarse "shaking" sensation underneath my body.
I do have an intention tremor, but this isn't observable and only takes place when I'm lying down. If anyone has experienced real earthquakes, this is weirdly specific, but it feels like it's around a 6.0. It feels so realistic that I texted my family to ask if they felt it only to discover I was actually bonkers.
Since I've now experienced it in multiple locations, I'm having to come to terms with the fact that this really is coming from my spine/brain and not some neighbor maniacally laughing while drilling washing machines into his ceiling. I'm curious if anyone else has experienced something like this.