Lipitor and maladies

I am 48 years old and I have been taking Tricor for about 4 years. About 2 years ago my doctor added 10 mg of Lipitor. My cholesterol went from 235 to 145, however during the past 2 months I have started to develop joint and muscle pain in both my arms. I went to the doctor and he told me it was tendonitis. I felt that having it in both arms at the same time was weird. I have always been very physically active and have not changed my routine. Last weekend I stopped taking the Lipitor and I felt a little better. I took it again this week and the pain is back. My doctor told me it is not the Lipitor. I am going to stop it for a week a see what happens.