The thing is, there is only no activity in your brain when you are BRAIN DEAD, and nobody has came back from that. You can be in cardiac arrest and in a coma and still have some brain activity.
You are currently experiencing a lucky and very brief window of awareness, sandwiched in between two periods of timeless and utter nothingness. So why not make the most of it, and stop wasting your life away trying to convince other people that there is something else? The reality is obvious.