What a wonderful description of your experience, bluematador! I find a similar comfort when I lay back in a warm pool with the water lapping my ears, in a state of weightlessness.
I must admit, in the beginning I didn't know what your post might contain. I envisioned the swamps here on the east coast with alligators, snakes and reedy grass that has lots of lurking creatures.
I'm glad you are feeling better!
Bluemountains