Life between lives

I haven’t died but I came close, it felt like a dream… almost easy to accept. I’ve known people to have overdosed and when they come back nothing changes in them. It’s hard to say.
My belief is once dead, you are as aware as you were before existance. A chemical (DMT) is released when you die… one that is suggested exists within all living things … in life and at the time if death.. and it causes hallucinations/ dream like states. Recollecting life events can be an example. I also believe in physics… all energy is not lost, just transfered. The transfer of energy can be considered heat. Perhaps if you were burnt… you would become heat. If you were buried you would become compost for the flowers, grass and trees… always a part of the universe in a basic way. In terms of consciousness, perhaps it is simply that your consciousness exists whilst your brain functions…. Still a reason to live a moral life, you may see it unfold at the time of your death.