Elporto, the reason they are rushing about is nothing to do with 'medical urgency'. You will find it is because half the team are going on holiday, as it's July. They need a whole team for mastectomy, y'see. Not so many for a lumpectomy. So they need to shuffle the patients round to make sure the whole team's there. And that's why they have brought forward your tests. It doesn't make a ha'porth of difference to outcomes to do an operation now or in two or three week's time. So it's definitely not that. But hospitals don't like to use the 'staff holiday' words when explaining this, and may end up frightening the wotsits out of patients for no good reason.
So, At the moment you have very good odds of a long and happy life. I do mean very good. Even with a cluster of small bits in the boob. Even with it sneaking into your lymph nodes. Even with it being an aggressive sort. The thing is, with aggressive cancers, what it means is 'thirsty cancer'. And chemotherapy requires cancer to be thirsty, so it drinks the chemotherapy and dies. The thirstier the better. So it's not anything to do with your odds of copping it. It's to do with what treatments and potions they are going to use.
A couple of tiny bits in the liver is no real problem these days either. If it is indeed cancer, they can do half a dozen interesting things to treat that. And the odds of success long term are still 80% from liver cancer that has one or two small bits.
So, you can plan that funeral if you like, but you're not going anywhere off planet, I'd reckon. You will be in for a long bit of treatment, though. Luckily all do-able for nearly everyone. And teams are very good at adjusting it if it's a bit too 'full on' for someone.
Hope that helps.
PS not a cancer Expert - just someone who's had breast cancer, is still here three and a half years later, and has spent years reading every single research paper that passes over the internet and taking a keen interest in it. Always check medical details with your medical team etc etc.