What type of diabetes do you have Syeda? What medication are you using? If you are type 1, are on MDI insulin or a pump?
Injected insulin does not match the food you are eating, it follows a fixed curve, so if you eat normally, you will spike. If you have dosed correctly for the CHO's you have eaten, it should return to your pre-meal levels 5 hours afterwards.
If type 1 and your basal dosage is correct, you should hold a flat line overnight and 5 hours after meals.