The brain or ego mind is the most insecure aspect of us. That is why you experience "this falling or maybe anxiety thing". The minds comfort level with these things is very limited.
You have experienced and identified, as well as labeled "soul traveling" and "dream traveling" for your mind and your human comprehension. Could you imaging that even those descriptions are not as well defined as they could be. This experience is either a 3rd category or an expanded appreciation for those previous ones that you have mentioned.
We are all spiritual people however our conventional understanding for that definition is sadly lacking. Its that ego mind thing again. I recommend expanding the "humility energy" to a place where it is comfortable with the unknown and the unknowable.
What you saw was your higher self. It is that aspect of you which holds the mind and love of god at its highest level. I suspect that the definition of god as described by the Kryon information may be something that you can connect with. There are 5 channeled messages at this page that may be able to help you with that.
http://www.kryon.com/k_25b.html
If it does, then good. If it does not, then keep looking. There are always better answers that we are encouraged to discover.
John