Could you ask to be referred to your local diabetes team at the hospital? They should have more experience in dealing with people with multiple heath issues and contra-indications with medications. Are you having treatment for your depression? many people with long term health issue can suffer and asking for help has no shame, whether its a talking therapy, cbt or a course of tablets. If your "diet pills" aren't prescribed, please consider stopping taking them, although losing weight is usually a good thing for type 2 diabetics (the less visceral fat you have the more your insulin reduces) if you have eating issues they won't help. It sounds like your Doctor has some common sense, go back and see them and explain your situation. If you get fluster/forget things write it all down before you go.