You need a gatekeeper to keep these well meaning friends at bay! At present you need space and distraction not the constant reminder!
This was the best piece of advice we received from the Counsellor that we were assigned on the day of diagnosis (we being hubby and me).
Just let her know today is not the day for discussion as my head needs space and distraction. When I have my appointments and an understanding of it all I will let you know but for now let's just let it be!
Agree with others, get her talking about herself or if you don't want that then tell her you're going for a soak in the bath or something that she thinks is for you only!
This is about you and best wishes for your treatment plan
Take care