I am r2p2, never, ever experienced this before. This has been going on for 3 or 4 days straight. When I stand from a sitting a position I am fine, then 10 seconds later (I have been counting) I loose my vision and it becomes black. I get extremely dizzy and feel like I am going to pass out. I also noticed this morning that my arms and legs and face become tingling and warm. I have to lean against something then in about 20 seconds it passes but leaves me with a awful headache and a achy pain feeling behind my eyes.
This happens every time I stand from sitting, and I don't have to sit for long periods either. I can walk across the room and come back sit down and stand again and it will happen again. Any ideas what's going on? I don't have a bp cuff and I was going to get one but then I am not sure how I could take my bp when it happens because I seriously feel if I didn't fight it, I would pass out. I am also drinking plenty of water everyday at least 70oz up to 100oz depending on my hunger level for the day.