I wouldn't recommend that course of treatment.
But on a more serious note, if you are concerned, of course get another xray. Can't hurt. But I will say that soft tissue injuries can take a LONG time to heal, especially if the pup is not on strict leash-rest. Alimony had a swollen wrist a year ago. I had similar scary thoughts about osteo... Her xrays were clean, and I leash-rested her for two weeks. Thought it seemed to go away, so I let her run... and yup, the next day, more swollen than ever, even though she never limped. So four agonizing (for my restless nutsy mamadog) weeks of leash rest later, and Alimony was back up to speed.