Is my wrist broken or sprained if straight but achey?

Only an xray can tel. Some wrist fractures have no obvious deformity get a xray scaphoid torus radial styloid hamate frx ro name a fewxalso wrist ligament injuries are serious tfcc tear strain get a orho eval.
Depends. It is unlikely to be broken if you did not have any trauma. More likely overuse injury.