I hurt my wrist and i don't know how, but it hurts to twist it.it hurts sometimes when i bend it back, but not as much.what should i do?

Rest: Sounds like a wrist sprain. Rest, ice, advil (ibuprofen) should help. Buying a wrist brace from a local pharmacy should also help. If the pain is severe then you need an x-ray. If it is not better in 2 weeks, see your doctor.

Depends: Let your parents see it first and decide if you need immediate medical attention, if not then watch for a couple of days and if no better get in to see your family doc for an evaluation.