@Lynn65, it's hard to prepare for what you don't know. I almost always come away from appointments, particularly with a new specialist, and as I process the information from the appointment, more questions come up.
Late last year I had an appointment with yet another specialist, an over the next few days more questions came up in my head. I found that there was a practice email address, so I wrote my questions in one document and emailed it off as an attachment. I had a response within 48 hours
Just might be one way around it, particularly with infrequent appointments