Sorry you find yourself here but you're in a good place on the forum. You'll find lots of support and help.
You're right that it's not over until it is truly over. Give her the time and space she needs. Work on yourself. Sounds like you've already started. 180 what you can.
We all have those days when we're ready to throw in the towel. It's part of the journey you've been forced into. Keep posting, even if just to vent or jounal. Read Sandi's Rules and DR. Read other threads. It's very early days and nothing is going to change overnight so don't expect it to.
The key thing is to work on yourself so that whatever the outcome you are a better person. You've got to try and maintain a PMA, as hard as its going to be. Stay strong.
You're right of course. But it is much harder in practice. My emotions use to ebb and flow like the tides. I am not use to dealing with the emotional rapid acceleration, deceleration, twists, turns and backward loops. When everything began I had an anxiety attack and later a panic attack. Things have not been that extreme for months, but stable and normal feel like distant memories.