First, adjust the size of your meals. Anyone who eats a large meal is going to feel tired afterwards regardless of if they are pregnant or not. Being pregnant is going to make the effect of a big meal that much worse. Most of your energy is going to be used towards digesting the meal so of course you will feel sluggish and drained.

Eat smaller meals and eat more often. Eating six small meals a day will help you Combat Fatigue.

Eating a good breakfast is the best way to start your day. You are refueling your body after a long foodless night with a good breakfast. A good breakfast is not a cup of coffee and a piece of toast. You want to stick to complex carbs and protein. Whole grain cereal and a banana for example.

These foods will stay with you and keep your blood sugar and energy level up for quiet a while.