ADHD assessment

Hi,

I got my date for the officialADHD assessment through it’s from the NHS. The end of this month. I got my letter today. 

It said the appointment will be 3 hours long.


It’s a man that’s assessing me. I don’t feel great about that. 


Can anyone tell me how things went for them? I feel 3 hours is a really long time. Will I get told there and then if I am diagnosed or not? 

Do I take all my notes with me? I am rubbish at talking and describing things.