We're going through something similar with dd oops and tbh, there are good days too when all seems as it should be and we think we're bonkers, but we're not. There are issues and there have been for years. It's just that they've ben put down to age and immaturity before. Now she is 7.5, the 'symptoms' are hard to ignore and the gap between her and her peers is widening, and she is recognising in herself that she is 'different' from others and wonders why.
You're doing the right thing by keeping the appointment and just write down your observations and examples as they're easy to forget once you're in there.