Wow this is a really crazy thing you experienced there. I have never had that kind of experience but I still like to daydream about stuff like that. I try to imagine different scenarios, for example whether if it would be possible if everything we are is just a feeling or if this world is maybe just a thought of some other being. Maybe also if we are just living within a simulation but to be quite honest I don't really like to think about this life as a simulation. Everything seems too real for me to just be simulated by a computer and I have no idea why somebody would want to do something like that. Either way I don't really understand that concept and scientifically seen I have absolutely no idea if this would be possible. To find an answer to the question why we and everything around us exists is really confusing in my opinion and all I really can do is doing some thought experiments that are super intersting to do but at the same time kind of overwhelming. Still it is a lot of fun for me and hearing from others what they think about that kind of question is super exciting as well! :)