Ahh yes, the waiting game! Well, it's in motion now and so you can at least rest easy that the bureaucratic stuff is almost at the end line.
Good that you're going for an IC appt tomorrow. I have found that even when I have thought of situations hypothetically, when it actually happens, there is a more stronger emotional reaction. I haven't gone to IC for a while, but I am planning on going for at least a session or two when the D is filed. Bring some sort of closing to all of this and let go of the final residual feelings that I may still have.
I am happy that you shared with a few close people in your life. It's just so good to share and disclose such stuff in a safe setting. I hear you about it feeling like it's anticlimatic. I felt the same with the whole separation papers. I think it hit me more emotionally when there was a name and face to the OM, even though I know she was out there dating.
You've come a long long way! Time to put all of this to rest and in the rearview mirror.