My body get hot n I get dizzy that I can't feel wat will happend and I almost pass out while I was standing on the line I'm pregnant 13 week with twin

Orthostatic hypotens. Your blood pressure is dropping when you stand up. We call this orthostatic hypotension. It could be because you're anemic, you may not be getting enough fluids. I would have your gynecologist run some blood work, or have to check your iron level.