I Just Had My Yearly Bloodwork Done. My Creatine Level

I just had my yearly bloodwork done. My creatine level was 48, which was in the low range. I go to my doctor on Thursday of this week. I would like to know more about creatine. I have been trying to lose weight and have But now I feel this may have contributed to this number being low. First time it has been. All my other blood work was okay. My Total Protein was just off a little, 6.3. I know I am gonna worry until my appointment. So anything you can tell me would help. Thank you.