when im going to sleep sometimes i feel as if i'm floating away from my body or falling, i used to wake my self up and fight it, but than i relized i should not be afraid but be curios, so now when ever that happens i try to get "as far away" from my body as i can. when i do this i shortly fall asleep from trying, so my advise would be to not fight it but explore it
your mind being disconnected from your body is not a bad thing, find peace in that you can forget about your physical body completely and only be inside your brain