Hello OldheadNZ, and welcome.
I'm not sure if keeping recordings, audio/visual, is legal or not, especially since these doctors and nurses don't know you have recorded them, and you did not give them an opportunity to consent or refuse consent, or even to talk about it with you first.
Is there a reason why you did not seek their consent?
I am curious myself, why you feel the need to record your interactions this way?
I imagine you are, because your mind is currently jumping all over the place, & you can't concentrate, can't keep track of what is happening, what was said, from day to day.
If you thought they were making similar recordings themselves, wouldn't you like to have had an opportunity to discuss it with them, to either consent or not yourself?
Thanks for your question. I think it is a very good question.