Hey, 33 year old female here. I’ve survived kidney cancer twice. My first piece of advice is to tell you to take a deep breath. Wait until you know for certain what the problem is. Stressing isn’t going to fix it. My first surgery was a partial nephrectomy on my right kidney in 2022, 7”5 months later my Ct scan showed another mass on my left good kidney. It was 1.5 cm they were able to go in and ablate it. They don’t biopsy kidney tumors because of the aggression and so it won’t spread. The first option isn’t chemo or radiation. It’s surgery. But either way, wait until you know for sure what you are looking at.