I'm 57 and started taking Zocor 20mg 1 month ago. Within one week...

I'm 57 and started taking Zocor 20mg 1 month ago. Within one week I was experiencing severe pains in my upper arm muscles so that I couldn't even sleep on either side or raise my arms to wash my face. The pains are sometime on one side then the other, then both. It also moves to my shoulders on both sides. I began suspecting the pain was a side effect of the medication. It also made my heart feel funny at times. I stopped taking the meds 5 days ago and still need to take a pain pill to sleep. I'm calling my dr tomorrow after reading all of this!!! I'm praying the pain with soon go away!