I'm an RN on a nephrology ward and waco_kid is right, you need additional lab values to indicate acute renal injury. No MD should have discharged you from ER with that diagnosis, you should have gone straight to a renal ward to get proper treatment and medication which in most cases can quickly stop the damage that is happening and get the kidney working properly again. Acute kidney injury can progress to end stage renal failure which is bad, bad, bad. Your high blood protein level may mean you were only dehydrated. Significant enough dehydration can lead to decreased urine output which can lead to the kidney being unable to properly filter the blood. The treatment in that case would have been hydration, either by drinking water or IV fluids. I very much doubt your cycle could have caused any AKI type of situation.