I had a cprtisone injection today after an mri revealed a meniscus tear and degenerative along with fluid in my right knee. I went down 2 sets of stairs and then a few blocks and then proceeded to step off the curb to cross the street, All of a sudden it felt like something tore and I experienced the worse pain, After that I could not bear any weight at all on my leg, I called my doctor and they said to rest it for 2 hours and if the pain does not subside go to the ER or urgent care, I feel if I go there the doctors there will not know me. Plus, my physician is in another county so I would not even see my docotr.