There's not a lot I can add beyond what everyone else has said, from personal experience with my father's cancer the following are helpful to us though:
Take a notebook along and write down what's said, it makes such a difference afterwards to have it there rather than try and remember.
If you've got questions you want answers to from the doctors then write them down before your consultations, before you leave read through the list and make sure you have an answer written against each one. It can really save the "Oh I wish I'd asked that" moments afterwards
If you're not happy with your doctors or what they tell you then ask where / who can offer a second opinion and then take it.
People like MacMillan Nurses can be tremendous allies even if it's just at cutting through hospital red tape for you. Even if you think it's not for you give them a try rather than say no straight away
Never underestimate the power of a positive fighting outlook!
Really thinking about you both and wishing you all the best. Get well soon 🙂