I hope you know how strong you are to have survived this, you are a warrior!
I'm going to give some thoughts based on my experience that I hope can help you, but apologies if they don't apply.
Your mum sounds like an abusive narcissist, someone with narcissistic personality disorder.
My mom is like this. I have finally found physical and emotional freedom from her but it took work and learning.
Read up about narcissistic parents and abuse. There are many YouTube videos.
These types of parents groom you from a young age to feel guilty, obligated, responsible for their feelings and happiness. Who we are, our dreams, goals, interests, mean nothing to them. We are simply an extension of them and a pawn for them to use and control. They enact on us a kind of 'soul murder'. That sounds bad but we can recover and heal from it.
The sort of brainwash us. It takes many years of learning, self care and therapy to 'deprogram' ourselves from their 'cult of personality.
They teach us: 'You NEED me, and you OWE me.
You sound enmeshed with your mother, telling her about your problems. It's a codependent relationship. You feel fear, obligation and guilt.
In my 30s I moved from my home city to another city a 3 hours flight away, to be with my husband. The guiltvI felt for leaving my 'poor old mother' was excruciating. But my therapist encouraged me. She said I had to cut the apron strings. That I wasn't my mom's carer or therapist, that I was allowed to have my own life and be happy.
The guilt slowly decreased year on year. Now I only feel a twinge once in a blue moon.
I hope you get freedom. Put yourself first, they can call you selfish, all the horrible names they want. But you only have one life. It is your life, not theirs. Your life to live and be happy. You deserve it X
Edited to add: try to stop sharing details of your life and feelings with her. Don't let her into your heart. She can use all of it against you, to try to control you and keep you emotionally dependent on her. Put her on an 'information diet'. If you decide not to go completely no contact (although I think you should), if you decide to just have low contact, keep things light, superficial, what you ate for lunch, what books you've read, even the damn weather!). Go grey rock on her. It's your time now!