Sometimes when I m eating the food seems to sit there & won t go down & I have to throw up. Other times I start getting dizzy, everything goes black. I can see my hands moving uncontrollably but my husband says I m not moving at all. I get pale & he says it s almost like I m having a seizure. I ve been checked out by a doctor before & he called it vago vasal syncope. Is there anything that can be done to prevent this from happening?