Had a physical on Friday, because I haven't had one since high school (I'm 24) and they called me today to inform me that my creatinine levels are really high in my urine test. I have scheduled a doctors appointment for tomorrow, but i didn't expect them to find anything wrong. Anyone experienced this, or know what could be causing it? I drink water with the exception of 2 or 3 sodas a day. I looked on Google and I found that my kidneys might not be functioning properly.