Did the doctor give you some kind of sheet to tell you how to eat? My husband is diabetic and I can tell you how he eats, but I don't know if it is different for a pregnant woman. Ideally he should eat 5 times a day, spaced.
Actually this is how all of us should eat. Just watch portions.
Breakfast, about 2 hours later snack, a couple of hours later lunch, a mid afternoon snack, dinner. Try to eat meals 4-6 hours apart and snacks at least 2 hours from a meal.
Then there is a distribution of carbs, fats, protein. Choose healthy carbs and don't worry about sugar. It's all about carbs.
We Aim for this distribution at each meal/snack:
40-45% of your calories should be Complex Carbohydrates. Pick low glycemic carbs with lots of fiber like whole grains, beans and plant based phytonutrients found in fresh fruits and vegetables.
25-30% of your calories should come from lean protein foods like soy, low or nonfat dairy, fish rich in omega 3 fatty acids and lean poultry.
25-30% of your calories should come from healthy fats like olives, nuts. avocados and seeds. Just be careful about your portions.