Pins and needles after brostrom repair?

I had ankle ligament reconstruction 3 weeks ago and keyhole.I was in a non weight bearing cast for 3 weeks and went back to hospital today and got my cast off.i was looking forward to this as i was getting put into an air walking boot.I thought I could put weight on it but every time I put pressure (ok standing and light pressure) i get pins and needles in my foot.Am i jumping the gun and expecting miracles or should I be able to fully weight bear HELP