Either way if your vet does it the old fashion way with film or the new way with digital, and they didn't have to send them off which is highly unlikely. You should have heard something the same day if not the next. Waiting with no response is VERY unprofessional by all means. I would go in and talk with him and if you are not satified I would get the xrays and find a new vet. Even if the pictures were taken wrong they should have been back out the next day to redo them. I know we always call our clients back the same day if not first thing the next morning if it is not critical.