DonnaSue,
You are a tough one. I know from where you come, so...
From first hand experience, kidney cancer (at least in the early stage) does not have cause pain.
After months of BCG for bladder cancer (going well, thank you), on a scan they found my kidney cancer - a whole different breed of cancer than the bladder.
Any things are still looking good. My team and I have a plan, treatment is happening, and a good outcome is expected. A new normal if you will.
Try to NOT get yourself tied up in negative thoughts and worry. You will deal with whatever life throws at you, once it has a name and you have a care plan.
Hug your daughter, get out and have a special day, play Chutes and Ladders..anything to remind yourself that life is good. Yes, we all know how hard it is to stop worrying about the "worst". But do try to stop.
Best,
Jack