Yes. Yes...But repeating the xrays at two weeks post injury to confirm or deny the presence of a scaphoid fracture is still recommended. We don't want to needlessly immobilize a wrist -.
Yes. Scaphoid fractures are sometimes difficult to visualize on x-rays, especially initially after an injury. If you have tenderness at the base of your thumb near the wrist, it is reasonable to splint or cast the wrist until follow-up x-rays confirm the absence of any fracture. Occasionally, an MRI study can be useful to rule out a scaphoid fracture definitively.