Thank you for posting your query in HCM This is Dr. Swarnava dattagupta answering your query. See, chances of rib fracture or dislocation is not much common following such falls though can happen. But muscle sprains are more common and that is probably what happened. I would ask you to do the following- Limit and restrict movements Take analgesics or painkillers Apply hot compress locally Get a chest X-ray PA view done Then you can consult your doctor or visit the ER as you have said. Hope this was useful. Regards