The past few nights I've been trying to keep my mind awake while my body falls asleep. The farthest I've gotten is my entire body will go numb or fall asleep and my mind is just kind of chilling. I specifically remember starting to hear a high pitched ringing noise but it went away shortly after it came. It seemed like at some points I would start to see different psychedelic patterns but not really full blown images/scenes.

Can anyone help me out here? I tried some MILD techniques from this point but I just couldn't seem to get it. Also I felt as if my astral body was able to somewhat pull away from my physical body but I think I just felt like that cause my body was somewhat paralyzed. I was sleeping on my stomach and I didn't feel any noticeable vibrations so I doubt it was anything near astral projection so...any help would be nice.