Thanks, Spotty-- and thanks to everyone, too.
The meeting went well, although I simply lacked the energy to be confrontational. I had also just gotten back from a midwife appointment and listening to the sweet sound of a heartbeat... so I was pretty blissed out. Lastly, the meeting was a performance review any way and probably not the best time to be reading my boss the riot act.
Part of the review included talking about projects for the next 6 months. After I listed all my projects I simply said "And somewhere in there I'm also having a baby." At that point my boss smiled and confessed that someone had already told him (I didn't ask who) and he was wondering if I was ever going to share the news with him. He then claimed he knew all about babies and delivering babies, so I shouldn't worry about a thing (this is actually pretty terrifying-- he is exactly like Ron Swanson from Parks and Rec).
We talked a bit about my leave, my schedule for checkups, and how we're going to handle the more complicated projects, and overall it was very positive. I AM incredibly disappointed that one of the few coworkers who knew didn't keep the secret and I am frustrated that Boss found out the way he did and that he had a conversation about it with someone else behind my back..... but I'm glad I have his support, and I'm relieved to move forward.