Hey OP. I could almost have written your first post in its entirety.
I've been battling the very same feelings and thoughts since I can remember.
I tried to end my life several times between the ages of 16 and 27.
And it's something I've never stopped thinking about.
Having my eldest, I finally had something and someone worth sticking around for. But the old thoughts and feelings crept back in when she was 18 months old, I suffered a late missed miscarriage and my husband left and I realised how little I had in my life and how little I meant to anything and anyone except my child.
I still feel the same now. I'm nearly 37.
It's not always possible to access the help and support we need, straight away. I'm still waiting for an appointment with the mental health team; it'll be in October. I've been waiting a year already.
So there are things I try to do, to help me push the feelings and thoughts to another part of my brain, while I wait.
I make sure there's somewhere at home where I can be comfortable and safe. For me this is my bedroom. I have my books, Alexa to play me music, my bears, and I can sit up or lay down. I do puzzles and I research things for fun, using YouTube. I try not to deny myself things I enjoy, where possible. I will let myself have some chocolate or a meal I particularly like. And I have a size 5XL zip up hoodie to hide inside. It makes me feel small and enveloped, which I like.
Once a fortnight I socialise at an event which I found through the meet-up app.
Sometimes I force myself to wear make up and try to dress in an appealing manner because it has psychosomatic effects on my feelings.
You can get through this. See a GP and don't spare them the details. They won't take your kids away. Being honest when we are struggling, is a strength.