I'm questioning my identity at thirty and feel lost

I thought I'd have myself figured out by now. Instead I'm lying awake wondering if the discomfort I've felt my whole life has a name I haven't claimed yet. I'm scared of being wrong, scared of being right, scared of upending a life I've built. There's no roadmap for 'maybe I'm not who I thought I was' in your thirties. I keep searching for stories that sound like mine. If you questioned your identity as an adult, how did you sit with the uncertainty?