Open Question: my joints are in extreme amounts of pain, why?

its mainly in my ankles, knees, hips and my right elbow and wrist. i went to the doctor and she said she doesnt have enough science to know whats wrong? so that didnt help one bit. i have arthritis in my family, my mum thinks its been passed down to me, but again im not certain. has anyone else had something similar? or any suggestions to what is wrong?