Soul, heaven, hell, all bullshit speculations with no factual basis. Do brain lobes have individual souls? What about neurons? When you lose a part of your brain due to lobotomy or dementia, does that part go to heaven? How many parts of your brain do you need to lose before "you" as an individual go to heaven?
But not all is lost. We don't even understand what consciousness is, but one thing we know about it as a fact - someway, somehow, your consciousness was already conceived at least once. There is precedence that consciousness can be created out of lifeless molecules, and you are living proof of that. Who says that within a couple trillions of years, the stars can't align in the exact same way again, and recreate the exact same consciousness that you possess today?