Nerve tissue symptoms and conditions

60 year old male on zocor for approximately 10 years. taking 80 mg daily.
only recently (within the last 18 months) i noticed some changes going on.
first i had joint pain in my feet, both feet, same areas. the foot pain went away but then the pain traveled up to the back of my legs, behind the knee,
when the muscle or tendons attach. every time i sat for awhile, then got up, the pain was brutal. that lasted about 3 months. later the pain shot up to the joints in my hands. both hands, same place on both hands. when i rotate my thumb or move it, the knuckle area of the thumbs, same place,
hurt bad. i will confront my health care provided at the va on these issues.
she disregarded my previous remarks and said arthritis, hands and feet and perhaps i overextended something at the gym on my behind the knee issue.
i think she is wrong. recently i had a severe cold and did not take the zocor for two days. the thumb pain subsided substantially. i resumed and the pain came back. now it feels as if the pain will travel back down to behind my knees again as i am beginning to feel a pull. any others out there with these issues???

started 10 mg in 1998. was controlling everything ok. In 2004 developed weakness in both legs, started slurring words and eye trouble, went to several doctors then in April 2005 had to quit work as I was just to weak. That was at age 54. Finally a neurologist diagnosed me with Myasthenia gravis, and lambert eatons myasthenic syndrome. Had my thymus gland removed, which is supposed to put disease in remission, also had small cell lung cancer surgery at same time. improvement did not come and the drugs for myasthenia only made me sick. started having chest pains and doctors ,.found several blockages in my heart ,still do as to weak for surgery, cardiologist took me off of lipitor and I seem to have stabilized, still have trouble with short term memory, and vision, and really weak