You should calculate your BMI.

Following a diet is the first step in managing Gestational diabetes

The USDA food database can provide nutritional information.

During pregnancy weight loss is not the goal, however for gestational diabetes, reducing carbohydrate intake is important as well as distributing the carbohydrates throughout the day.

In general, calories should be distributed as 45% carbohydrate, 30% protein and 25% fat.

Caloric intake can be estimated for most people around 17-2300 calories/day.

A calculator can be used to more accurately assess daily caloric intake.  Many calculators are available, including from the American cancer society and, and the USDA

Carbohydrates are 4 calories/gram, Protein 4 calories/gram and Fat 9 calories/gram.  These are close estimates.  Usually 15 grams carbohydrate is one serving.

Diet should be distributed into 3 meals and 3 snacks.

Example:  2000 calorie diet:  900 calories of carbohydrate, 700 calories protein, 500 calories fat.  This equates to 225 grams carbohydrate, 175 grams of protein, 55.5 grams of fat.  3 Carbohydrate servings for B/L/D and 2 for each snack.  35 grams protein for B/L/D and 30 for the first two snacks and 20 for the bedtime snack.  Fat calories ~ 9 fat calories/meal including snacks  (or 55.5 grams total for the day).

Blood sugar values are checked 2 hours after the start of breakfast, lunch and dinner.