Did surgeon think your level of pain was normal for 3 wks post op?
Often surgeons don't want to admit that asurgery doesn't stop the pain completely...

Or if the surgery did not go well..
Even more so if someone messed up during the surgery..
There is also a condition called RSD/CRPS that once in awhile will occur even after a slight bump, and after a surgery too.
Can you describe your pain?
Is it the same pain & location you had before surgery or something different?