There's absolutely nothing wrong with you, I promise. You sound like someone with a lot of anxiety who possibly had a difficult upbringing or partnership relationship at some point. Hypervigilance and anxiety are adaptations to danger and a lot of criticism, among other things. These adaptations keep you safe when caregivers or partners or situations are very stressful and things are beyond your control.
Feeling responsible or "wrong" is also an adaptation. It gives you a sense of power and agency and keeps you going in a world that is otherwise very bleak. If it's YOU then maybe you can change ....is the thought process. It has saved many a child from despair, but in later life it's less helpful.
I am not sure what you might need, but reassurance is a good first step.
You are ok. You are absolutely ok, and there's nothing wrong with you, I promise.
I really recommend counselling or psychotherapy with someone who understands the neurobiology of attachments and boundaries and trauma.
Today, right now, you could read about the effects of trauma/traumatic attachments on children, and see if anything resonates for you.
Additionally, searching for resources around self-compassion and vagus nerve regulation is a good thing you can get straight on with.
Sending you lots of calm reassurance right now xx