Hi Chrwe,
I agree with what Doc wrote. Also, just using a nice hemi-sync or Metamusic CD for a few days, like during a nap, gives your brain the opportunity to find balance which is great help for balancing emotional states. The synchronization of both hemispheres of the brain seems to me to be conducive to achieving what you want to experience, some spiritual expanded awareness....but more down to earth than that it also is conducive to mental and physical calming and relaxation which should help you feel more "refreshed" all around.
As far as your OBE attempts, I always suggest that you don't focus on physical proof tactics. It's the wrong focus. It's not that it doesn't work, but it shifts your "attention" to the area of proof in a specific form which is too narrow a focus. Keeping a broader, open mind about OBEs will give you the opportunity to have, recognize, and remember your OBE's.
We naturally already have them whether we remember them or not. So your focus of attention should really only be on setting intention to remember your next OBE. Be persistent, patient, and keep practicing...those 3 "P" words are great.
Quickly, I'd like to share an anesthesia experience I had. I was in surgery for having a tumor removed from my lung. Upon first awakening I could hear my parents talking to each other, hear word for word what their conversation was. It was so clear I just assumed that they were standing in the room I was in. It made me upset that here I was in this condition, scared, and in pain, and they were just casually talking as if they didn't have a care in the world. Several minutes later my parents walked up to my bedside, smiled, said hello, the usual. I asked them why they didn't come to me sooner, why they had just stood there talking about my 5-year-old nephew and how he'd wanted them to set up the camping tent, and how they couldn't remember how to do it, etc. My parents were shocked and asked how I knew what they had talked about. I told them I heard them, but they said that was impossible. The waiting area was on the other side of the hospital....no way that I could have physically heard them!
It was proof enough to me that the effects of the anesthesia had made me have an OBE, even though I didn't feel I had gone anywhere. I had a similar experience while being under during dental surgery. I was sound asleep but remained "awake" and aware during the entire procedure. My proof? I had stopped breathing and they had to put me on oxygen. When they told my mom I wasn't breathing on my own, she fainted. I saw it happen! When I finally came around I was so concerned about my mom, the first thing I said was, "Is my mom ok? Why did she faint?" The dentist was shocked and wondered how in the world I could have known that. He said I was sound asleep thru that.
Those were my anesthesia experiences. You feeling "nothing" as if gone, and not having memory sounds normal and typical. So I don't think you should feel worry or base beliefs on your "typical" experience.
I'll send you a PM with some of my personal OBE tips in case you're interesed in trying them.