No food for 7 days, little water, sometimes none all day, max 15 hours of sleep in the 7 days. what signs would suggest seeing an md, what damages?

Wow- not good: What led you to this regimen? This is not normal, or healthy. You may not have any signs, but consider these- dizziness, very dark or discolored urine, no urine, trouble breathing, trouble seeing or fast heart rate- you may have some of these, and you may need a doctor's attention. You may want to see a doctor to discuss the circumstances of this, to make sure it does not happen again.