I have been taking Lipitor for the past 6 years without I thought...

I have been taking Lipitor for the past 6 years without I thought any problems. I now have pain in my left shoulder that feels like a rotator cuff injury. Doc sent me for an X-Ray which showed no abnormality. He then wanted to send me to an Orthopedic dr for an MRI which I didn't do. I just had my blood work done for the 6 month check and it revealed tha I was anemic. He referred me to a hematologist to check further. His preliminary diagnosis is multiple myeloma. I have lower back pain along with pain just under my rib cage on my left side. I have felt all along the problem is from the Lipitor, but the doctors don't think so. How does this pain take to clear up. I have been off the Lipitor for nearly 3 weeks with no change. If anyone else has had this pleas let me know asap. Thanks