David,
Very sorry that they could not move forward yesterday, it just seems like a black cloud is following you on the journey. You have a great team of Physican's caring for you, and I feel that they will work together to find another solution to get some answers for you, and another plan of treatment. Do you ever feel like your a part of the old Hew Haw song that had the line "if It weren't for bad luck, I'd have no luck at all"?
You are a real fighter David, please don't give up looking for the right combination to get better.
Kerry