Yes, the hospital will have this on record, your record there. They can't share it except with their doctor who saw you while there. If you don't share this with any new doctor, they won't be able to access it. There is a police report, but unless you are carted off again soon and by the same police, I doubt they would link the reports.

I wouldn't put too much stock in what you think you didn't say, because you were out of it. I'm glad things are better now, and perhaps the hospital visit did help you, at least in stopping you from sliding down that dark slope?