Hi.
okay, so for about a month now I've been having very abnormal head rush. Whenever i stand from laying, or slouching, etc, I get a major head rush, and my fingers, hands and arms will tingle and shake, and I can't stop it. Today, for the second time, everything went completely black, and I opened my eyes to laying on the floor, shaking an tingling. I couldn't stop myself what so ever, so I had to just lay there and let my body continue shaking and spazzing, which lasted for about 30 seconds. I have no remembrance of falling to the ground. It's starting to scare me, and starting to get worse. Im concerned, because I don't want to randomly fall anymore, considering I JUST had back surgery. What could this be?