Center chest symptoms and conditions

After being on Diovan hct 160/25 for about two years I developed a severe stiffness in my neck, a piercing center chest pain when I coughed and so much muscle/joint pain I could barely get out of bed in the morning. Don't know if it is a result of Diovan, but this is my only med. Finally (after a year) I spent six months undergoing tests and consults with one doctor who finaly gave up. A second doctor diagnosed fibromyalgia and prescribed diclofenac, which somewhat controls the neck stiffness and pain. Now, a year after the fibromyalgia diagnosis I am learning Diovan might be at fault but don't know what to do next. Any suggestions welcome!...

I previously posted that my son's liver enzymes were very elevatedon Singulair, Ast/got 3x what they should be. Off singulair one month and they went back to normal. He was having symptoms of severe reflux at the same time that the enzymes were elevated, had severe pain center chest-no vomiting. It turns out that he has a case of mild gastritis and moderate to severe ulcerative colitis. Has anyone else had this problem ? He never had the diareah from colitis until he stoped the med. He was on Singulair for more than 6 years with violent behavioral issues and meltdowns.