I get dizzy when i move my head and stand up. my balance is also out. this started yesterday. ?

Imbalance causes: Dizziness described is statistically more likely inner ear (labyrinthine), but cannot exclude dehydration, anemia, hypothyroidism, medication reactions, B-12 issues, even intracranial (central). If this gets worse, go to emergency facility, but also consider seeing your regular doctor and decide how to manage. May be a simple issue for physical therapy.