Check out Roemheld Sydrome...
http://en.wikipedia.org/wiki/Roemheld_Syndrome
my mother has had that problem, but she's 79. her dr. told her that it's because energy is being used to digest the food...something like that. in any event, it was something to do with eating. have you had your blood pressure checked lately?
it could be that your iron is low? or that you need to drink more liquid.. like water and no soda..
it could be ur blood sugar...
if u feel dizzy, put ur feet up...
Yah i went to the doctor for that it was just a really bad bladder infection i guess now its getting better everyday so thats good.
I usually get dizzy after I eat, but only if I havent aten for a while.