Hi, am currently on 5mg Carbimazole as cannot tolerate any higher. For the past 5 days I have debilitating back pain with nausea. Was so bad went to A/E where I was given oramorph and sent home with 'muscle strain'. When I first started carb 20 mg I had thigh pain which subsided on lower dose and this back pain is the same sort of pain. I am in trouble managing this pain, can't leave the house as truly cannot walk. Any advice as to how convince doctors this is NOT muscle strain ???