How long do side effects from statins last once you stop taking them?

I have been taking 20mg of Lipitor for almost 2 years and have felt yucky since shortly after starting. My cardiologist allowed me to go off one week and I did not see a difference. He also cut back daily to three times a week. I ache all over - neck, back, hips, knees, elbows, and legs are weak. Recently had a normal CK test, but PCP said we might consider a trial off statins since I am below 200 now. Has anyone stopped taking statins and saw a significant decrease in muscle pain, and if so, how long did it take?