I feel for you. As others mentioned, it can be a marathon. My W had a rough childhood as well, gave me ILYBNILWY, and was or is in an EA. BD was in Sept and I've seen just about 0 self reflection on her end. I'm still blamed for all her woes. Its been hard mentally to stick it out this long. Are you ready for it? The people here are with you either route you take.
I too looked for a magic bullet. I still do. Time and change are the bullets here.
If she does return, do you want her back?
I have young ones as well, make sure you yourself are the strong parent. Your child needs one through this.
If I could pass anything over to you, its to not Google about her problems, rather, work on your own. I learned things like Anxious/avoidant attachments, covert narcissists, BPD, passive aggressive behavior and so on. All it does is increase anxiety, remove hope and build resentment. All time I wish I devoted more to boundaries and validation. If your W is like mime, she rarely talks about her feelings, which makes validating a challenge requiring alot of effort.
Good luck Kto.
H37, W37 D4, S2 ILYBNILWY 9/19 BD 9/19 EA discovered 10/19 Currently in limbo, no D or S process initiated