Fell in dec. Caught self on l hand, wrist bent backward. Er ro fracture. Burns 7/10 especially bearing any weight or movement. What could b wrong?

Need new X-ray. Sounds like a fracture not seen on first x-ray. Be sure to check the "scaphoid" bone!
Be seen. It sounds like an occult fracture. Be seen and get new xrays, as a small fracture may not show up initially, and could be seen as it heals. If there still does not appear to be a fracture, then it is a soft tissue injury or bone bruise, both of which will resolve on their own, but can be very painful.