Thanks for the replies, everyone.
By the time he scheduled the appointment and let me know, it was too late for me to ask him to wait.
On the one hand, we have had a relationship that is really lopsided. I've worked really hard to make the relationship better and dig in and I've pushed him hard throughout our marriage. It is a part of who I am, but also I'm learning, been unhealthily imbalanced. So, I feel good about releasing things and giving him more room to decide what he wants/needs to do. So, when he asked me if I thought he should confess, I told him that I supported him being true to himself and his process, but that I can't answer for him. In essence, I verbally released him to deal with it. But I did think it would take a few days at least. Then when he scheduled it, it hit me. I felt anxiety, but I also feel really blah about it all. Maybe that is part of me letting go of my own coping mechanisms of being overly responsible for the relationship?
So, it's done already. From his report, they responded calmly and kindly but obviously didn't have a response or action plan yet. They asked him if he had let the AP know that he would be informing the school and he made it clear that NC is most important and that he can't be worried about her in any respect and can only be concerned about his own process and family. In the end, he asked what he should do now, and they told him to show up for work tomorrow (now today) and they would meet with him in the afternoon. They also affirmed that they believe that he absolutely did the right thing in confessing.
On the other hand... For so long in our marriage, there has been fallout because of his selfishness and it took up so much space. Now, he is going through a really hard process and it takes up so much space. I'm SO tired of it. He loves to sit close and hold hands and is trying to be present/emotionally connected. But he's terrible at it. (he's better than he used to be, but that's SO relative). I want emotional connection and for him to really "hear" me and physical intimacy. I used to long for it and now I feel like I'm giving up on it and don't even feel the urge to open up or be physical.
It's all mixed together. He's growing and I'm wilting?
I know this is long. This is all just so stupid hard. I know it's not realistic: but I wish things would either just be good or total shit.