Shoulder, Neck, lower back and side knee

Its a bit difficult to explain the type of pain i suffer from. Sometimes it pains in my shoulder and where the clavicle meets the sternum. Its in both shoulders, significantly in left one. It gets quite painful in moving the shoulder, n when i do so, i also fell pain in the neck's side region. Its goes on for some 3 days and it stops suddenly without any effort or medication. Then it comes back again after some days. When it doesnt pain, i m able to play cricket n all physical activites without any pain at all. But strangely, it comes back, not sure how!! Till a month ago, same thing was in the knee area also, the lateral area, to be specific. It used to pain a lot when i woke up. N strangely, the pain used to vanish in 2-3 days. Then it used to resurge in some days. Can you pls advice me on this??