I have chronic pain in my left lower leg and knee. i also have a very sore shoulder on the right side, and movement of my arm is limited.. x rays of the knee and shoulder shows no abnormalities. do i need to see specialist ?

Maybe: One possible more common cause of shoulder pain and limited movement is rotator cuff injury. This usually will not show up on plain x-rays. It can often be a chronic nagging type injury and you may want to see an orthopedic specialist. The knee pain may be some form of arthritis though not enough info for me as you mention lower leg pain as well. Again, an orthopedic surgeon may be of help.