I was out for a few, and every time i got up out of the car i would get very light headed feeling as if i'm gonna faint. haven't eaten anything today. hypoglycemia or hypotension? something else maybe

Hypotension: What you're describing is postural hypotension. Your blood pressure drops when you stand up causing you to feel lightheaded and dizzy. This can be caused by dehydration, medication, a heart arrhythmia, or severe anemia. Since you haven't eaten, and you were drinking alcohol, it's probably dehydration. Drink a couple liters of fluid over the day and you should feel better!

Good thinking: Both of the illnesses you mentioned are high on the list. You need to see your physician for a complete exam and blood tests to rule out either of these illnesses and maybe come up with another problem you might not be aware of.