Hi thanks for your question.
You were able to use hand after accident which means chances of fracture
dislocation are less ,though cannot be ruled out altogether.Most probably you have got soft tissue injury
with haematoma(collection of blood under skin and muscle).You need a X Ray
hand and wrist to rule out fracture dislocation.Consult an orthopediac surgeon who may be able to examine you to dtermine the extent of injury and may prescreibe you appropriate treatment.
Hope this answwrs your question.