This isn't a psych (it's more psychic than psychological ) explanation, but I believe we are body, mind and spirit and there are some people on YouTube who claim (mediums that provide horoscopes for example--something I no longer follow) they have drifted above their body and have communications with spiritual beings. If you view some of the threads at Sanctuary for Spiritual Support--I can recall where one member talked about having an experience with a spiritual entity that caused her problems (don't want to refer to the specific member in case my take on what she said is the wrong spin on what happened).

It is also my opinion, some of my dreams at night are caused by God or other spiritual beings (and, of course, some are from my own mind).

I said all this to say that your spirit might have the ability to "drift" out of your own body. When I walk, I have always had the ability to get into a sort of "meditative" state where I stop worrying about things and my mind just drifts. For me, it is a relaxing state where I remember things and sometimes am able to solve problems/get new ideas. I will pray for your protection while you are in this state.

While you may not agree with this explanation, I hope what is happening is not making you feel too anxious.