I feel like I've left my mind?

When I'm anywhere I can walk perfectly without ever tripping. I don't think about what I'm doing I just do it. It's like I not there and I am not sure where myself even goes too. It used to scare me but now I'm used to it and I even enjoy it. I've also read that we are "astral projecting" when we dream of flying, floating, or falling. For years, I have had dreams, sometimes for weeks straight that I fall and I wake up with a sudden jerk. I feel the sensation of falling. Can anybody actually tell me what's happening to me? I want to try to practice intentional astral projection, but not if it's some weird religious thing (not connected to Christianity).