I don't think anything happens after you die. Once your brain stops functioning thats it. Just nothingness. Logically thinking thats the only possible outcome, but since it's impossible to confirm you never know for certain. It would certainly be interesting to be proven wrong with actual evidence.
I think the reason the concept of an afterlife exists is because people fear the unknown, the thought of dieing scares them.
It's kind of funny how something that scares most can actually be really comforting…