Went well!
She was SO apologetic. But, courtesy of Traveller's advice, I went in ready to shrug off any patronising words with "it's feedback" But she ended up saying that herself. Huh.
She is very thorough - she did double check a lot of my needs, but she tends to do that anyway. She's certainly not shy with a pathology form! 5 little tubes of blood taken, and one wee cup!

But, yeah, thanks to you all, and this experience, I feel so much more confident in my ability to speak up and get what I need.