I'll second what @katgob said. What does your surgeon say? They can either tell you the wait is ok or help speed things up.
A few ideas about how to get a scan in a more timely fashion:
Get on a wait list.
If you can, be willing to drive an hour or two to a location with more timely options. I did that for a PET scan as I live in a medically underserved area.
Take care--I know first hand how stressful this is.