Not surprised you're feeling a bit rattled and vulnerable. That's a huge thing to process, even if you weren't taken by surprise.
Be extra kind and patient with yourself over the next few days. And you probably already know this, but many people have an attack of imposter syndrome just after getting an official diagnosis ("maybe I was trying to influence the outcome?") so be ready for that. It's just part of working your way through all of this stuff, a normal reaction to a confusing situation.