Sounds like the hammock experience is initially disorienting for you. The brain and body will adapt and you'll figure it out. Sleeping in a hammock is the closest you will ever get to the experience of sleeping in your mother's womb. But sleeping in a hammock can be a shock at first - it doesn't feel natural but it's the most natural thing in the world.
I'm glad I never went through anything like that - I laid in a camping hammock the first time and my body and brain said, "This is right, so very right."