I know that feeling all to well.
It's kinda like, today is the day you get answers that are going to impact the rest of your life and your child's life. It shouldn't feel like that but it does.
Today is the day you get direction.
I'm kinda waiting with baited breath, my oldest I've just been told is on the spectrum. I'm now waiting for that final meeting and the lengthy report that will hopefully put everything into perspective. It's silly really, because I have always suspected but until that clarification I have felt like well maybe and then again maybe not, so I've been tense not being sure, for a long long time.
Good luck I hope you get all the answers and direction you need to move forward. 
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Mum of 2 fantastic boys. oldest 21 yrs= newly dx'ed ASD
youngest 12yrs =dx'ed ASD, ADHD,OCD,GAD and tourettes.