It's hard enough at diagnosis to wait never mind all the delay you have had. However keep in mind that you have had quite a workup already so they have a pretty good idea how urgent this all is in regards to surgery times. But also not getting an infection or issues with your heart during surgery is paramount to ensure nothing delays the next stage of your treatment, whether that be chemo , radio, both or not needed. All of this is not final until after pathology and review if your general health. A slight delay now but no delay after may now be the go.
I was diagnosed just before Christmas 2015 with a suspicious lump and waited 2 weeks for pathology results, then another week for first consult and then 3 weeks until surgery. My cancer was very aggressive yet there wasn't any concerns of the wait...and I had no health issues.
I remember the fear of "is it growing and spreading " and I was relieved when it was finally out. I imagine after your Monday appointment it will all happen quickly. Do tell your breast surgeon your concerns and seek guidance as to risks etc. Everyone is an individual and be impressed you have a team considering your entire health. You don't want an adverse outcome from rushed surgery. Yes it is life threatening....but not this week.
Hope all goes well Monday and your date is set soon. Kath x