The first thing is that the statins will be long out of your system by now. However you need to help your body return to normal by rebuilding muscle strength. This will be a slow process and will require you to eat a good healthy diet with a moderate protein intake.
The next stage is that your muscles require activity to assist with rebuilding muscle bulk and you should see a physical trainer to start to come up with an exercise plan that gradually increases in activity and intensity as the pain improves. You should also see a pain specialist to check that your painkillers are optimized to mainain pain control.
So, it is a long slow process and I appreciate that your pain may be holding you back from being mobile, but do continue to move as much as possible within your limits.