@sjd_barra ... my sister in law came in with me (my brother & husband came with me but not 'in with me') - she was terrific - and even had a couple of questions to ask of the surgeon. She came to my post op appointments too. Maybe see if you can record the conversation for later use if needed. As @Chelley59 says .... information overload is definitely what happens in there!
You may be surprised at how family & friends 'step up to the plate' upon hearing the news. On the flip side .... they may be very upset at you not telling them, too! :(
When you go for your results after surgery - I would definitely recommend someone else to go with you. It can be a very emotional time - and you may still be recovering from the surgery and unable to drive, depending on what you are having done ....
All the best xx