I was about 16 weeks with my 2nd (a boy) and would get so dizzy, I couldnt see or stand, a few times I did faint. I was terrified of what could be wrong. My doctor tested everything my heart, my sugar, even my head and everything came back normal. I suggest drinking alot of water, and sometimes orange juice and crackers, like cheese crackers would help alot. If you start to feel dizzy try to lie down on your right side. It always helped me too.