I have been having episodes of sudden dizziness while standing that i couldn't balance myself, what are the possible problems from that?

Dizziness is a descriptor that is nonspecific. This could be lightheadedness where you feel as if you are going to pass out when standing or could be vertigo, a feeling that the room is spinning, with a loss of balance. Lightheadedness is usually due to a drop suddenly in blood pressure and could be from dehydration. Vertigo could be from an inner ear problem. See your doctor for confirmation.