Update
It's still a bumpy and eye-opening ride for me. We fluctuate between being on top of the world to "I can't live this way anymore," and we swing on a dime. Both of us feel things are very tenuous, and we aren't used to that.
The main issue is that I need a ton of reassurance, but I don't know how to communicate specifically what I need. At one level this is my problem, and I need to bolster my confidence. But at another it is her 'problem' (as my primary partner) to make sure I know I'm primary in her eyes. I'm sure opinions are all over the map as to who owns more of this problem, but we need to figure it out ourselves, and we haven't yet. When you hurt, it usually feels like the other person's problem...
But the good is wonderful, and I need to keep my head from spiraling into a negative place. How do I communicate what I need when it starts to happen?