Starting taking Lipitor 20mg 3 weeks ago to the day and all of a ...

Starting taking Lipitor 20mg 3 weeks ago to the day and all of a sudden, over all pain in the muscle and joints to the point I needed to lie down and sleep for 2-3 hours. After I wake up, I feel like a real person again and then within 1 hour, bang right back to pains and a fuzzy feeling in my head!! Dr did some retest and told me that it's not because of the medicine and could be a flu but no flu I ever had felt or acted like this. I have been off it for 4 days now.. does anyone know how long does it take to get this stuff out of your system!!! I want my life back thank you!