Re: 18% kidney function left what to do??
Unfortunately, diabetes can cause kidney damage. I know, you've got enough on your plate already, you didn't need this, too, but unfortunately, diseases don't ask permission.
For now, you need to focus on stopping the damage. Stay hydrated, don't eat too much protein at one time, minimize sodium and potassium in the diet. Work on your blood pressure, and most importantly, keep your blood sugar controlled as closely as possible.
You should probably see a dietician to design the best possible meal plan for you. Generally people don't need dialysis until kidney function drops to 10%, and the more careful you are, the longer you can postpone it. A transplant may be an option later on, start investigating now.
Did the hospital give you the names of doctors to follow up with?