Bring a list. Embarrassment makes everyone forget things, including you.

Worth asking what specifically was measured. Pain scores move with mood and function does not.

Same here.

You are not imagining it and you are not being difficult. Document it and take the document in.

Small wins count. Walking to the mailbox is a data point.

Written confirmation email after every phone call. Cheapest insurance there is. Not on the Netherlands but the pattern is familiar.