Recovering from dehydration--when will the dizziness stop?

Yesterday I went to the doctor and he told me I was dehydrated. I had all the symptoms. So I stayed at the doctors office for about three hours getting an IV for hydration and then I went home. He told me to drink pedialyte and eat things with electrolytes like rice and crackers. So I've been doing that as well as consuming other foods. Ive managed not to throw up anymore and keep my food and fluids down, and I have no diarrhea. But whenever I get up I still feel dizzy (less so than yesterday) bit when will it just stop??