Random shooting pains in my leg?

I have been in a walking boot for an ankle injury for almost three weeks now. Within the last couple of days i have been having off and on shooting pains(pretty painful) in the upper part of my leg(the one without the boot). Is it possible that these pains are occurring because i am walking oddly due to the boot? I was wondering if any doctors or people with similar experiences could tell me what was going on. Thanks for any help!