Knuckle area 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???