I Had A Shot In 2 Locations In My Right

I had a shot in 2 locations in my right knee about a week ago. The first injection was much more painful than any other shot I have ever got before. The pain I was having went away but I was left with a different kind of pain after the shots. It's like when the dentist hits a nerve. It has only gotten worse everyday and now I can't walk without excruciating pain and have to use a cane right in front of me using both hands but it is still extremely painful. I have been using an antiinflammatory, Diclofenac 75mg, 3 times a day. The pain is just getting worse and is now affecting my leg. I see my doctor in 4 days but I can barely walk at all. Help!