Good to hear from you Yuri.
I know, those rehab hospitals aren't a lot of fun, but they're essential. When I entered rehab in Bangor, I couldn't walk, couldn't move my right hand much, and was in a complete fog. They helped me get over all of those obstacles (except the fog
I'm just kidding. My memory is even coming back now). The point is, don't give up on the Massey concert just yet. You'll be surprised at how quickly you can recover if you work hard enough.