I think many of us here understand. I often felt very disconnected. For months I felt as though I was literally floating and all of my senses were "off". Now I understand that is part of my injury and it has improved. My vestibular system, vision and central nervous system were all damaged. But for the first four months my doc just said I was fine. I knew I wasn't fine.

Get some good medical care and understand what is going on in your body so it's not so scary. No I just try to think of these strange episodes as little science experiments and try to understand what is going on rather that getting anxious or scared.
Su seb