Sorry to hear of your continued leg pain.
You mentioned this was your 1st PM appt - was it your Surgeon who referred you? Has he already released you? perhaps if your concerned you could call Surgeon's ofc and at least speak to his nurse, see what she thinks ...and ask if he'd be willing to see you ~ possible it's not a new level involved but there's no sense being unnecessarily frightened of new complications or occurence of disk problems that may or may not be.
It is true you "can" have problems with adjacent levels, but not written in stone that you will.
If you've come this far and are now able to control your pain with the meds you mentioned your doing pretty well for being 9mo post op.
Think postitive and SO WILL WE
Call and ask - it can't hurt.
please keep us posted ~