Well, it depends upon who looked at the X-Ray.......if a junior Dr commented, then yes a fracture could have been missed.However if it was reported on by a Consultant Radiologist then it is much less likely that a fracture has been overlooked.
\\\Today the foot is much more swollen again and sore and the shin, where the lump is and above is burning when I walk but not hot to touch. \\\
No, recurring swelling is not normal and I would return to A&E or your doctor as the haematoma doesn't seem to be healing and might, although unlikely, indicate infection.