Fear and anxiety even after going NC

I’m still scared of my family. Even after nearly 6 years of 100% total non contact (no texts, no emails, no calls, no visits of any kind) and building my own life and my community, the fear that they instilled in me - and its attendant stress - has never left me. I lived in fear every day I was in touch with them. Now that I’m not in touch anymore, I feel like the only thing that will free me from my fears are them dying. Because only then I’ll be 100000% sure that they will never be able to harm me anymore. Until then I live with constant background anxiety and fear that they will come back to harm me. Even if I remind myself that now I’m an adult, I have resources, I can defend myself, I can call the police, my partner will defend me, if they ever came to bother me again - it’s still extremely scary.

I know my fear kept me alive for a long time. But now I don’t need to be so afraid anymore. I’m an adult and I’m strong and I have a great support system who will go to bat for me if my parents ever came to bother me again. But it’s hard to stop being afraid when you’ve been scared shitless for so long. But my fears are causing me chronic pain now - like horrible pain that prevents me from living normally. They aren’t helping me anymore. It’s time to let them go. Any advice on how to let those fears go? I’m already in therapy.