Right! Take a deep breath. You are the same person that you were yesterday, in that, the diagnosis means very little. I had no emotional response to my adult diagnosis either, though it has had an impact down the line that i'm still processing.
I too was the weird kid, now I'm just eccentric and mostly harmless. Accept yourself for who you are, the world needs more interesting people and if those in your circle can't accept you, you deserve to find yourself a better circle.
Talk, friend. It may be cathartic, or you may work something out for yourself and find a new path. It's all good
Being ND in a Neuroboring world will likely always be difficult, do what you can to make it easier without compromising yourself. - I've stopped masking, and don't care that much if I cause a little disruption!