What should I do with wrist injury that is two weeks old?

Get a diagnosis. With a two week old wrist injury you are risking a worse problem as a fracture that will not heal or an instability. You need to see a hand surgeon.
INJURY? It is tough to answer a question when your description of your injury is rather vague. You dont mention the spot where it hurts or waht the inury is so you can imagine it is hard to give an answer?If you know you have an injury and it has been 2 weeks get evaluated, splint, xray follow up.