Jen
Yes, that is proper venting 😉
Even if it is not always that easy to read, I enjoy reading such posts, since it echoes the state of your mind so clearly, and I find it interesting to see how wearing or not wearing a belt can affect people.
Of course it was a big decision, and you'll need some time to adjust, but it sounds like you have all the pro and con arguments clear, so now it is working through the hard moments, and I'm sure it will become more stable after a while.
In some ways it seems like it would be easier for you if the decision to wear or not wear would be taken away from you, but since your mother has her own agenda, she would not be a suitable keyholder. (Well, of course she does hold the key, but you are still in control, mostly.)