@alwaysworried Welcome to Mayo Clinic Connect.
Per National Kidney Foundation guidelines, you are on the edge of Stage 3A kidney disease. https://www.kidney.org/kidney-topics/estimated-glomerular-filtration-rate-egfr

If I were you, I would get that appointment in late December for a nephrologist, and then ask to be placed on a cancellation list in case you can get in earlier. Not that this is an emergency, please note.

As we age, our eGFR levels may naturally slide down a bit. Our primary care providers often do not get much education/training on kidney disease or when to be concerned, much to the dismay of their patients who suddenly find out they have a treatable condition! At this point, in my humble opinion, I would be watching your intake of sodium, calcium, potassium, phosphorous, processed meats. Stop using NSAIDS like Aleeve and aspirin. Good hydration, moderate exercise, good rest, reduced stress. Here is a renal friendly diet from Mayo Clinic: https://www.mayoclinic.org/healthy-lifestyle/recipes/kidney-renal-diet-recipes/rcs-20522796

Sometimes our kidney concerns are a result of diabetes left untreated, or high blood pressure, or medication side effects, so it is good to definitely rule those out. Don't panic, remember to breathe, educate yourself using reliable tools like Mayo Clinic, Cleveland Clinic. Dr. Google can lead you down a rabbithole of misinformation and panic, so just don't go there!
Ginger