Zocor and validity

I am 33 years old and after a blood test about 6 months ago showed my cholesterol levels high my doctor prescribed me 40MG Zocor (actually generic Simvastatin). Since then I've started to forget things and just cognitively I'm slower and less capable. I also had more aches and pains and a weird creak in my knee showed up, but I really didn't key in on that stuff. I went back to my doctor and told him about the cognitive issues and he said "that shouldn't be a side effect of this drug".Well I am very glad I found this website because at least now I know I am not crazy. I stopped taking that garbage about 4 weeks ago and ever since that fog has been lifting.
I have also made a new commitment to myself to include more "heart healthy" foods into my diet and to completely eliminate all red meats as well. I realize there may be some validity to the studies done remarking that high cholesterol is an indication of something bad, but I am not convinced the medical community actually has a comprehensive understanding of cholesterol in the body. I will still go into the doctor to get my levels checked, but I will probably not go back to my old doctor. I'll probably find a doctor who is a little more open to other options. I hate to say it, but I have lost my confidence in my doctor. If I tried to pull something like that in my job as a computer network engineer my customers would simply say "it wasn't like this before you started". Jedi mind trick doesn't work buddy. My body wasn't like this before you gave me that stuff.