Well I found out my new instructor Dan took a job flying a freight plane so he's not available for lessons before 5pm anymore. That won't work for me because I need to be home at 5:30 and also, it gets dark at 7 (and earlier every day).
But it's ok, there's not too many lessons left. I have a remedial navigation / pilotage lesson scheduled for Thursday and hopefully I can make up the failed lesson Friday or early next week. At some point I'll have to choose another CFI but for now I need to focus on getting past this stage check.