Vibrating tummy???????

Sunday my tummy had this vibrating sensation out the blue. It wasn’t like a kick or a baby movement or a Hiccup. It was as if my phone vibrated inside my stomach. Startled me and it happened again today when I was laying in bed in the same position. Has anyone had this sensation. I have not idea what that could be. I did google and it said something about irritable uterus and also a baby having a seizure but I didn’t want to google myself into worry.