Do you think it is wrong for someone to say they are autistic when they aren't diagnosed?

I have an upcoming assessment but I am only doing the assessment as a bit of affirmation for myself to combat my lifelong self doubt. The outcome of the assessment will have no impact either way on my life in general. I have done my own research and realised the reason for so many aspects of my life, struggles and unexplained inability to function the same was as those around me. 

I know now why I am the way I am. An official diagnosis would be comforting as a way to dispell the inevitable self doubt but it will not change what I now know about myself.

This is a late diagnosis for me and I have a whole lifetime of "aha" moments to look back on. I think maybe self diagnosis might be a little bit more problematic with younger people as they go through all the trials of finding out who they are.

Good luck with the assessment - I'm in a similar boat by the sound of it, and I'm hoping that  if/when mine finally lands, if nothing else it's closure on all that searching for understanding about what my issues relate to. I know that already of course, but even so...

Exactly, a bit of closure and the confidence to go forward with a new understanding of things

Exactly, a bit of closure and the confidence to go forward with a new understanding of things