It is Three Weeks and It Still Hurts in That Spot. It is Hard to Walk. Will This Be Permanent? It Has Me Very Worried.

Recently my doctor gave me laser treatment behind my knee to treat a spot on my Leg. It was excruciatingly painful. I think he hit a nerve. It has been three weeks and it still hurts constantly. It is hard to walk. Will this be permanent? How do I treat it if he did hurt my nerve? Should I have an MRI? ......the spot is still there too :(

No doctor answers yet