Yesterday after I was done eating lunch I stood up to put my dishes in the sink, and got really dizzy. So I laid down for a bit. Then when I felt like I was doing ok and that the world stopped spinning I stood up then everything went black and I passed out, luckily I was able to collapse on my bed before I blacked completely out. Kinda scary but my sister says its normal in the 2nd trimester because your blood pressure is all over the place trying to adjust to all the blood pumping through your body. I am just lucky I was by my bed and not somewhere where I could have hit my head or gotten hurt.