I don't think you have a case at all.
Somebody did the right thing - that is, calling professionals after you were unconscious. It's also not unreasonable to take you in after a suspected head injury.
You were unconscious after a fall. It was absolutely possible that you suffered a grave injury. That's why you needed to be checked out. You are not a physician (obviously), so you likely don't know what may or may not happen. A closed head injury can be fatal even if the patient has a lucid interval and behaves normally.
Perhaps you should be just a little grateful for the people who actually did what's in your best interest.
If they hadn't have turned up and you did actually suffer a severe insult to the brain, you or your representative would be here trying to sue the providers for NOT treating you.

