Finally got a diagnosis, and now I start losing patience.

We've recently had a diagnosis for my 7 yr old daughter for ASD. 

Since she was 2 I knew something wasn't right, and it was her school that finally got her on the pathway. Up til now I've been really patient and protective of her, but since the diagnosis I've somehow lost the patience I had. I feel like I've suddenly turned into a really bad parent!

Has this happened to anyone else?