Hi @Melburnian no fun, hey, all this uncertainty. It can wreck your confidence a bit. The old ' overabundance of caution' thing in the early days of diagnosis can lead to situations like yours. The general approach is to take the least invasive actions first but, unfortunately, things can escalate uncomfortably quickly after that.
Its a good time to stop looking at the stats. They are really just that; a series of numbers that may, or may not, reflect your personal situation. Even the stats themselves have been derived over many years and do not represent the current advances in treatment. Until you know more about your own version of horrible, it's really best to leave them alone. Easier said than done, I know. Like Tonya, I'm a two time winner of the booby prize and am still around 16 years after my first diagnosis.
If you've learned to speak IVF, you'll learn to speak BC as well so don't worry about that too much either.
Focus on the end game, survival. Ask questions when you need to (pretty much constantly) and be prepared to occasionally get different answers from different professionals (I'll bet you are familiar with that scenario too) Choose your team carefully--you have more choice than most realise--and build relationships with those who resonate with you. Good luck. MXX