I Had Total Knee Replacement 7 Weeks Ago. Since That

I had total knee replacement 7 weeks ago. Since that time I have been experiencing some type of strange pain in my foot, which by the way, after surgery there was a cut across the foot. The cut healed but the pain I'm having hasn't. I'm thinking this might be some type of nerve damage from the surgery, perhaps when the foot was strapped down. Is this common?