Small steps.. and yes, expect the unexpected. That said we cannot control the diagnosis, maybe we can control the way we REACT to the diagnosis and deal with it?
The emotions you experience over the course of treatment; the loss of control and feelings of loss, sadness, anger, fear, shock and adjusting to it all can be hard. It may take a year or two to feel life get going again. It can be like a " death and rebirth "..etc.. It was for me, anyway. It took some years, and even today, every day I still think of it, even though it was in '98 and 2003.
Sorry you have received another big SHOCK. You may know what the mass is on the kidney after an ultrasound etc. So much waiting and I still remember it. Learning to lean on those who you love is ok. You will get through it.. but it looks a long road right now, and it is. Time passes, so just take it one small step at a time. Get all the facts, ask questions, and ask for help if you need to also.
Best of luck, Kathy.