stomach pain on rough terrain

Hey everyone,

Yesterday I went biking on some rough, rocky terrain. At some point I was sitting on my saddle and the whole bike and me were vibrating as hell. That's when I felt a sharp stomach pain as if my stomach was falling down. I had this pain for the rest of the ride whenever I rode rocky terrain and the vibrations were strong. What just happened here?
Did anyone else experience anything similar?
This is the first time it's happened to me. I also don't feel any pain otherwise.