I need some advice for joint and muscle pain that has lasted every day for 3 years?

I have had daily, debilitating joint and muscle pain for at least 3 years now...I am female, 31 years old, and a cake decorator, which I can understand some joint pain on my right shoulder because of the repetative motion that I do every day icing up cakes. The pain is in both my shoulders and both of my hips...it feels like the joints are rubbing together and I hear and feel cracking when I move. Now my neck muscles are so stiff that I can't turn from side to side...up and down is mildly painful...I have been to every doctor known to man (an orthopedic doc, a spine specialist, an infectious disease doc to see if I have lyme's (i dont), my general doc, a rhumatologist)...no one has an answer for me...I have no rashes on my body, so they ruled out lupus... it just seems to be getting worse every day...I don't know what do to. Thanks