White coats symptoms and conditions

I was diagnosed with type 2 diabetes in 2001 and have been taking 10mg simvastatin ever since. Over the last six months have had severe increasing pain in right shoulder neck and arm. Out of the blue the doctor has since automatically changed dose from 10mg to 40mg. I have not taken the 40 yet as I am too scared and am using up the 10mg. Sometimes have diarrhea and nausea. I had to wait 2 weeks for xray and another 2 weeks for the result. Am to see the doctor in 2 days because I cannot stand the pain any longer. A month ago he told me to come off the simvastin as I would not have to wait long, but after 2 weeks thought I had better go back on it again. Have now stopped again because the pains are worse. wondering about taking herbal medicine instead.