I meant everything that has to do with super natural stuff, like reincarnation, which is what seemed your original post.
You said you dont believe that big bang stuff but nobody even knows if the big bang happened or not, its just the leading theory. And even there are different kinds of big bangs, for example, the eternal inflation one, or the expansion+contraction. And I dont even know much about that stuff... You are making the mistake of because you dont know it, it must mean its magic or destiny or something controls it (god or whatever). If we didnt know about the universe you would say that you would like to die and go to heaven, like the literal heaven above us, because you wouldnt know better. The parallel universe theory is also that, just a theory that arises from one of the quantum theories, but we really dont know.
Think about what I said earlier, end of consciousness is the end of yourself. Take this very specific example: imagine that after dying, 1 year later, all your exact particles recomposed exactly as you were before dying, with all memories and shit, it wouldnt still be you. Even if before and after consciousness were the same, the continuity was broken, it would be like a clone of yourself, someone else, feeling the same as you.
But in more basic terms... I really dont see the appeal of thinking that in some other universe there is a version of me doing better. Im still screwed. I could see the appeal of thinking that if I die, Ill do better "next" time, being next time heaven or reincarnation or any other kind of continuation... But I dont believe in any of that because consciousness is just neurons and energy states.