Sorry to hear that hartbroken. It's definitely the meds you were on -- those essentially ruined your health giving you diabetes, while meant to help you cope with your depression. I know a lot of musicians in my real life. Some of whom take antidepressants. They have all told me the same thing you have here; how antidepressants just saps them of their creativity and they have to fight really hard to produce let alone perform their music. I like InsomniaVia Haldol's suggestion of creating music then posting it online. That at least keeps you connected to that kernel of creativity that made you into the musician you STILL are. Don't let this deter you.