Well, typically, scaphoids fractures can be difficult to get healed, even if they are undisplaced. Being shaped like a pair of peanuts in a shell with the break occurring in the 'neck', the two ends, though still held in place by the bone capsule, are not easily held together. Thus healing can be 'delayed'. This does show up in an xray but needs a trained eye to see it. Regular doctors are not often experienced in that field.
I would therefore suggest you report your continued symptoms to a reputable hand surgeon for a investigation including a check xray. If my suggestions prove true, then a bone graft or screw fixation could be necessary.
Tip - the longer you leave it, the more difficult it will be to resolve it.