Hi, has anyone else here experienced cognitive issues while recovering from trauma?

I’m beginning to worry I’ve been permanently damaged and am in the middle of a cognitive decline. My concentration is short, and my memory feels like it's slipping away from me. Several times a day, I catch myself forgetting what I’m doing or why I came into the room. I keep forgetting my keys in the lock on the outside! Five times this month I realized in the morning that I’d been sleeping with an unlocked door! As a journalist, all my life I used to be sharp, quick-witted, and on top of things, but now I can barely hold a thought in my head for more than a few minutes. I’m distracted, my thoughts are a mess. I’m not coherent when I’m talking about something less trivial, my sentences mingle, and though words are coming from my mouth, I leap from thought to thought, and it makes little sense. My brain has turned against me, and I feel like I'm losing myself more and more each day. This makes me want to isolate myself from former friends, because I’m embarrassed that I can’t make a coherent argument or take part in conversation without letting myself down. As if it’s still me, with all my knowledge and wisdom, but downgraded to someone who was dumb at school... Has trauma erased my intelligence? My therapist insists that isolation is not good for me and that I should socialize more. No one seems to understand the anguish that comes with mental health struggles. I think therapy doesn’t help me. It's terrifying to think that I might never get back to the person I used to be. Everyone expects me to function like a normal human being, but my mind is betraying me at every turn. I want to feel like myself 15 years ago. It's all a cruel joke, and I'm the punchline. I don’t know if I should seek additional help from another specialist for my cognitive issues?