You shouldn't feel dumb you didn't screw up your T did. If she knew her client need to be grounded before she/he? left then maybe she should have popped out and connected with you briefly or scheduled you so that this wouldn't have happened. It is sio easy to blame yourself for others mistakes. I hope you at least try to see the T and you have every right to tell he how waiting 30min effected you. The T needs to know. Please try not to beat yourself up over someone elses mistake. It is hard I know I am there and am working on that. It is really hard for me to voice my needs but I am learning. We are here for you! And please don't worry about spelling it is not what is important You are!