Dog is limping after back surgery.

Chloe is 9yrs of age. She has been lame in her left hind leg for the past 3 yrs but MRI scans did not clearly show the problem. IN the last 12 months her condition deteriorated in that her lameness was much worse so she has another MRI scan at another hospital and straight away they saw what the problem was a slipped disc at S7/L1. So she underwent a dorsal laminectomy about 5.5weeks ago and when I collected her from the hospital, I saw her walk without a limp and indeed come home without a limp and do very well. However, when she had her staples removed at 12days she had a bit of a limp from the walk to the vets from the car. It took a week to go. According to the discharge notes, it said I should walk her twice a day for 5 minutes so I started 3 days ago and she is incredibly lame now, so I stopped immediately. She is taking Previcox, Metacam and an anti depressant for the pain. I am worried sick. The surgeon said it is his policy not to prescribe meds over the phone and I will have to wait until 13th/14th January for him to assess her. I am worried she will not get better. She is resting nicely and complying well with not moving and I intend to keep her that way for a month at least.