Simvastatin and three months

I am an active 60 year old.After being checked for diabetes I was told I was borderline and chose to try by changing my diet. Three months later at my next visit UI was told I was improved but my cholesterol was far too high and prescribed 40mg Simvastatin.Between then and the nest three monthly check I had numerous symptoms. My calfs throbbed, my shoulder ached and my sex drive decreased and I was always tired. The most frightening thing of all though was my concentration. I would be riding my motorbike or driving the car and suddenly snap to and realize my mind had been wondering and my concentration gone. (Ive had numerous near accidents.)
IU read on this site about "memory loss" and wondered if this was what was happening to me. My last three month visit was last week, my cholesterol is almost normal so I am stopping the pills and seeing what happens.
Steveb

Started in Jan. this year on 10mg dose. Came off in May for three months as I was experiencing nausea, joint pain and depression. Had to go back on last week as cholesterol is sky high. This time 40mg - feel violently sick, keeping going to the loo about -10 times between 7am and 10 am. and so tired am staying in bed most of day. Phoned the pharmacist today who says to stop taking over the weekend see my doctor on Monday as there is an alternative to Simvastatin that does not given so many problems and to try taking porridge each morning as this can significantly reduce cholesterol naturally?? Will give it a try, YUKKK......