Welcome to the board. There is a lot of great support and information on here. I hope you find the answers you are looking for.
I wouldn't say it is worse to be diagnosed at anytime. I think it is a positive thing because it gives everyone a better understanding of who you are. Maybe it will shed some light on things in your past that were just difficult for parents, teachers, peers to understand about you and how you tick so to speak.
What are you feeling about the dx ?