My DD (2.5) got the diagnosis last week. I felt relieved, because I knew she would now 'qualify' for the continued speech/lang etc she will need. But I felt hugely helped in coping by having read MN for the last 8 months, gathering info and reading what other people had felt.
So I knew that most people feel shocked and upset, even if they are expecting it. I prepared myself that I would feel strange about it. That really helped me to cope and to feel not alone. I decided to view the diagnosis as a sort of 'shorthand description' of my DDs problems/issues, so that others could quickly understand her.
Of course I still feel very upset if I look to the future, as I don't know how she will progress. But for now, especially seeing how long many MNs have had to wait for diagnosis, I felt grateful (for the assessment period not dragging out for years in limbo) and relieved that we could now look forward, and to stop wondering if I was 'seeing things which weren't there' or 'just doing something wrong which made her so difficult to manage'.
She is still lovely (difficult, but very lovely at times), but now I have a 'tool' to try and get the best for her as she approaches pre-school etc.
Sorry, very long. First time I've written about it. Still assimilating it all. Thank you all the experienced MNs whose experiences and wisdom I've read. 