Hi, Tami-- I can understand your anxiety, as I went thru acute renal failure a year ago. (Do NOT let them give you Fleets for a prep if you ever have a colonoscopy and are taking lisinopril!) Anyway, I didn't recover and now have late stage 3 CKD. Your creatinine is above normal for females (high normal is 1.2). I wouldn't worry too much about the eGFR of 57 at this time-- my nephrologist says that the estimated GFR formula underestimates kidney functioning in healthy people and overestimates it in sick people. The real measure is the 24 hr creatinine clearance test, so that's great your primary care doc is ordering that. If your 24 hr test indicates a problem, I would definitely start seeing a nephrologist. They will tell you if you need to be on the renal diet. The renal diet is difficult and can be frustrating, but it IS do-able. The biggest factor in preventing or slowing CKD is maintaining tight blood pressure control. Lisinopril is considered the best medication for this, as it is very kidney gentle. Your doctor may also put you on a cholesterol medication if your cholesterol is at all high, because kidney disease raises the likelihood of cardiac disease. If your 24 hr test shows that your kidneys are compromised, you will be getting routine blood work. This will not only look at your level of kidney functioning, but will also assess whether you are anemic. A significant percentage of CKD pts (I'm one of them) also have low red blood cell count, because the disease causes the kidneys to shut down production of epoitein, necessary for the production of red blood cells. If that's the case, then you get injections which stimulates production of red blood cells. If you do have CKD, please be reassured that you can live many years without feeling ill. At your level, you may not even need to be on the renal diet as long as you avoid salt. (There is controversy among kidney docs as to when the diet needs to be implemented.) I remember how overwhelming it was when I began this road, but a good nephrologist not only can preserve your health, but can also be very reassuring. Hang in there, and please keep us informed of any developments. People on this board are very supportive and interested in each other's situation.