I fainted last week andI went to the ER and was told that I have stage 3 chronic kidney desease. I never was told that I have had stage 1 or 2. I'm Diabetic and I've taking Glipizide with 1000 mgs. of metformin for years. In Feb. they swithced me to janumet 5/500 which is metformin. I've read that metformin is dangerous to take with kidney desease yet my Doctor has not changed my medicine. What should I do? I don't want to end up on Dialysis. Can anyone help me with this, I'm in tears and scared to death.