I feel like your diagnosis doesn't cover everything hamandcrisp.
I am not a medical professional and no way qualified and of late, I've got my own diagnosis wrong when self diagnosing but if I will share my experience so that you can decide whether any of it relates to you.
I don't want to give specific information here as I want to remain anonymous.
I am an older lady ( not yet of retirement age).
I grew up in an abusive and neglectful household. I have had some terrible things said to me, been physically assaulted, ridiculed, mocked and emotionally neglected.
I have received diagnosis of anxiety, depression, social anxiety, generalized anxiety in the past.
In the past 5 years I have received a diagnosis of complex post traumatic stress disorder (C-PTSD). I feel at last my condition has been recognised. It has not changed my state of mind as such but it feels a far better label for what I have experienced and given me some validation. I would suggest at the very least this could apply to you. You have been traumatised without a doubt.
Recently, I went for a neurodiversity assessment believing I had ADHD. I have been informed that this is not a fundamental issue for me but I do have strong indicators of autism and I am guessing there will be some overlap.
I have strong rejection sensitivity and severe abandonment issues and also issues with attachment. I fear being on my own. I suspect this is because it ignites my sensitivity to rejection/abandonment/attachment. Not only did I have an awful time in my home growing up, I was also ostracized at school.
I have also become attached to therapists in the past who have suddenly left. You trust someone with your inner most thoughts then they leave and this is hugely difficult. They are working in effect. But it can feel more than that almost like a deep friendship due to the profound sharing of your innermost thoughts and feelings.
I do have children. However, the prospect of not having children when you want them but can't have them can cause profound grief (I understand but don't want to elaborate here), The fact that we were not cared for as children can cause profound grief. Perhaps we are longing for that caregiver that never was, that should have been. I was wondering what to do with that today. I struggle with the prospect of taking care of myself, it doesn't come naturally.
The longing for connection can be intense. If a neurodiversity is at play, it can further exasperate issues (I have often felt like I'm looking through glass trying to be a part of but not quite ever getting there). I would suggest having a neurodiversity ruled in or out. The friendships I am developing are with others who are neurodiverse and I don't think this is a coincidence.
I haven't got any answers. I will probably always have to live with anxiety and depression. I am about to complete a course of EMDR. Anything to try and alleviate the angst I find myself living with.
I am a deep thinker. I have turned to writing and books for salvation. I have using writing to try and help me navigate my difficulties. More recently, I have shared some of my writing by reading aloud to others. I have made people cry with my writing, somehow, sometimes, people identify. And others will identify with you. Such a lonely place to be, I get it. I am so sorry this is happening to you. If I lived near, I would walk in nature with you and gently chat. It is something I very much enjoy.