FAIRYDUSTPINK89:
If the one kidney you have is in good working order, and doing what it's supposed to do - I wouldn't worry too much. However, if you feel unsure, and can't stop worrying, you could always ask your doctor to do relevant lab work just to make sure all's ok and to give you peace of mind. You don't have to have just ''one'' kidney in order to have kidney probs

If your one kidney is functioning normally (as it probably has been doing your whole life), then it's just doing the work of ''two'' kidneys, which is normal. Don't worry!!
Monte