Sometimes, i lose proprioception and black out?
Hello, so sometimes when I stand up or spend energy doing something after sitting and/or standing still not doing anything, I black out and lose my equilibrial sense and my proprioception. I feel like I have no bounds and that I am everywhere, and it is timeless and kinda calming, except for the fact that though my eyes are open I cannot see. This happens at least three times a month, if not once a week, and I wouldn't say the feeling is unwelcome but it is surprising. Often I am just getting off the couch to do something and I have to stop in my tracks because if I keep moving I will fall over. I also try to grab on to something to stabilize myself, but I also feel like I am part of that something too. Then I hear my heart pounding and slowly regain vision and continue with my quest. Is this normal? Do other people experience this?