This is my forte sadly.
I would advise you to get in to the practice of self-compassion. There's a lot healing to be done and after the initial processing, it can even be interesting and enjoyable. But right now, be really kind to yourself.
I recommend the self-compassion work book by Kristen Neff phd and Christopher Germer phd. I've also listen to all of Kristen's books on audible, but I got the hard copy for the work book and did the exercises and the intentions.
it's not all ''woooooo''. There are practical considerations, it talks about the yin and yang of self-compassion which I found interesting.
Soothing yourself and validating yourself and believing in your own interpretation of events might be the yin but protecting yourself and setting a boundary and motivating yourself to take a difficult decision that you know is right for you is the yang.
I watch a lot of youtube videos and I really rate Anna Runkle the crappy childhood fairy. Also, Patrick Teahan and Jay Reid.
They stopped me obsessing over ''narcissists'' which is pointless. They helped me identify the wounds that existed in me and helped me figure out how to sooth myself, heal those wounds.
Basically if you have an abandonment wound, commit to being there for yourself. Supporting yourself. Putting your needs first. Trusting in yourself to be there for yourself and be kind to yourself. Similar stuff for a shame wound. Honour yourself. Do the right thing. Be kind to yourself be direct not passive. Honour your experience of an event. Honour your reaction t that. For the betrayal wound, show yourself the loyalty of believing in your own interpretation of events.
There's so much out there that's so helpful and although the self help genre is much maligned there is no shortage of books from authors with phds!
First be kind to yourself though. What would you say to you if you were your own dear friend ?? When you've figured that out, Condense that in to a mantra and then repeat it to yourself. something short like you deserved better than this but you are strong enough to recover from this and I will be rooting for you all the way.
There are so many wonderful books out there. But I had a tendency to devour them in an intellectual way and yet not feel much better. It's only in the last few years that I've realised i need to be looping in the physical reaction.