Simvastatin and leg pain

What brought me to this site is the fact that I have a bitter taste in my mouth that gradually occurred since I have been on Simvastatin 40 mg for about three weeks. I have also noticed a strange burning/numbness in my heels only, which has also been gradual. I feel more sleepy most days and not what I would call fatigued, but just like I don't feel like doing anything. I eat more just to try to get the taste out of my mouth and don't feel like exercising. I also finally went back to my Pilates class and felt unbalanced when trying some simple stretches. I usually have excellent balance. I guess my question is: Are these things related, and are they going to just get worse?

my mom has been on simvastatin
40 mg for 3 months & she has had
back pain leg pain & know kidney
failure she is a diabetic but never had any problems before but taking tthis medication it has ruined her life plus she gets lots of night mares & night sweats she
feels & looks like she is drunk
but she has never drank in her life

Am 47 y/o male have been taking 10mg since June 30, 2008. Over last couple of weeks have had bouts of severe leg pain, not cramps but just achy. Also have lower back pain especially in morning when waking. Problem is i have chronic back pain so hard to distinguish between the two but it just feels different. Also bouts of fatigue. Called my doctor and was told that the aches in legs not a problem because the side effect is cramping not soreness. I don't buy that.

Switched from Zocor to Simvastatin approx 2 months ago.
I have developed stomach upset, nausea, headache, foot pain, leg pain, knee pain, hip pain and shoulder pain.