This happens to me sometimes, It happens when I woke up, I stand up for a few mins or probably longer, all of the sudden my vision gets blurry, I feel so weak to stand, and I cant really breathe properly, my brain hurts. After that incident, I usually lay down and eat something. But after sometimes, it gets worse, the last time I went through this was yesterday and its actually getting worse. Because it usually last for about 2-3 mins, but then it last longer. Am I okay? or is it my blood pressure?