@cranky_granny - you should have a direct line to your oncologist's office or the oncology ward at the hospital who would advise the Onc that you are wanting to make contact - and the Onc should get back to you in a timely manner.
I hope your GP sends some skin scrapings off for analysis ..... if they haven't, maybe ask for it to be done.
Definitely do 2 copies of your questions & put one of them in front of them, on their desk ...... if they don't answer them voluntarily - ask them to! ;) Use the 2nd copy to write notes on.
How long since you’ve seen your actual Onc? Do you take anyone with you as an extra set of ears? If you are having difficulty following what is going on, can you get a Breast Care Nurse to sit in with you to explain it all in a way that you can understand?
I’m with @Lisa1407 on this one ... you should be having more regular check ups whilst the bone lesions are actively changing ... if you aren’t up to it yourself, maybe a breast care nurse or ask the BCNA team to intercede on your behalf? xx
take care xx