I finally had to stop googling! I’m a retired RN, my brain has gone thru way too many scenarios.
So, decided to control what I could at this point.
I’m hydrating with water (70 to 80 oz/day per dr recommendation) and keeping daily protein intake to 40 mg or so of mostly plant and fish proteins.

@aconsolmagno If you are confused about your kidney function, perhaps you are seeing a PCP and not a nephrologist. A good nephrologist will look at trends of Cystatin C and Creatinine markers. A good nephrologist also looks at trends in sodium, potassium, and phosphorus levels. All this will do is give your doctor an "E" stimate of your kidney function. The "ONLY" true kidney function tests are the iothalamate clearance and iohexol blood tests offered by Mayo and presumably at other great education hospitals like the Cleveland Clinic or Univ. of Michigan, etc. Employ a team of dietition, nephrologist, and PCP for overall care and reduce anxiety.. Lastly, as we age, kidney function can decline for some but many others remain unaffected. CKD is more commonly found in patients with Type 2 diabetes and/or heart related problems such as blood pressure. Beware as Google searches may yield "Garbage in, Garbage out". Trust your nephrologist or find another one.

@aconsolmagno “creatine” do you mean “creatinine”? I hate it when words and spellings are similar and then autocorrect tries to help and sometimes screws everything up!