I have been off of simvastatin for over 3 months. every time i think i am getting better, something else comes up. I now have severe pain in my right calf, the knee and my achilles tendon. does any one else have these issues. If i walk for any length, i am all right when walking but afterwards, i suffer for days. does the pain ever go away. My doc did a CPk test for muscle damage and she said that it was elevated but i dont have muscle damage.