Great advice in this thread. I too could barely walk at first, with nasty setbacks if I overdid it (which was easy to do).

I'm now mostly back to normal, but it has taken 2.5 years. It probably took a year and a half before I was walking somewhat normally. I'm still careful to avoid jarring and overexertion. For me it was (and continues to be) a long road back.

My advice is to try to be patient and take the long view. The gains add up, but it can take a while - sometimes much longer than you think. Get as much rest as you can and increase the walking and other activity very gradually. Sometimes it will feel like you're plateauing or even regressing. Just ease off gently and rest. You can bring it down a notch and try again in a day or two or three. Recovery is truly a marathon, not a sprint. You will get better if you learn to back off and not push through symptoms.