Thanks for the information Ian Jeffery!
I agree that you should have the test for muscle enzymes
But in addition to that you should have an electromyography/nerve conduction study done as well to look if there is any nerve or muscle disease
Simvastatin can be associated with muscle damage and iffound it should be stopped as well
Bendroflumazide is a diuretic and can be responsible for muscle pain due to electrolyte imbalance
Regarding treatment I would suggest that you should be put on gabapentin to see if it help
Other option could be opiod analgesic like Tramadol
You should also be on physical therapy to get a relief from pain
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