Can I still report an injury if I left the store about an hour ago?

Question Details: I slipped and fell inside a store about an hour ago. At the time I didn't feel anything but I was super embarrassed and just wanted to leave. Now it seems like the shock wore off and I'm in all this pain and I would like to maybe go back and fill out an injury report in case I have an actual injury that costs me a bunch of money and I need to seek legal action. Can I go back and fill out a report if I already left the store and it's been an hour?
