so i fell about 6 months ago and landed on my left knee. Since then my knee has been feeling pretty painful. The pain usually only occurs when i do a lot of walking or i keep it bent for a long period of time (at the movie theatre), but also sometimes i get random shooting pains in my knee cap. i went to my physician about the pain and he examined my knee by bending it etc but he deduced that there was nothing wrong. Now i am experiencing pain in my left buttock/lower back. The pain is more of an ache than sharp pain. Its worrying because both pains are causing me to walk awkwardly.
please, if you could give me some advice on what to do it would be much appreciated.
ps. i would like to mention that all my joints tend to 'crack'. My ankles make a cracking noise when i walk up stairs and i often have to crack my elbows and on rare occasions my knees. have also been to my physician about this and he again said that nothing was wrong.