Im 12wks and as I was cooking dinner I suddenly started feeling really sick and cold. I then began feeling weak and dizzy so I sat down with a glass of water but knowing i was going to be sick i tried to make my way to the bathroom. As i was waking i got a cold sweat all over and my vision went black , my body went weak and i dropped to the ground and crawled the rest of the way. My vision came back after a few seconds and the rest of the symptoms eased fairly quickly after id been sick. Has anybody experienced this or know what it could be? I had my blood pressure taken today and it was fine so don't think its that.