For your height you normally need to eat 1800 calories daily. Now that you are pregnant you need to increase your daily intake by 300 calories, total of 2100+ a day. Add an additional 200 calories if you are breast feeding after the baby is born, total 2300 calories daily. This will keep you healthy and baby will grow for both pregnancy and breastfeeding.
The recommendations for pregnant women are to avoid consuming alcohol drinks of any form (including wine, & beer), and caffeine drinks (drink non-caffeine coffee & teas). Pregnant, breast feeding women and children do not eat shark, swordfish, king mackerel and tilefish due to these fish having the most amount of mercury in their bodies; and to consume 2 times weekly fish/shellfish with the lowest mercury levels are shrimp, canned light chucked tuna (canned white tuna- only once a week), Pollack, and catfish. The foods you eat should come from all the food groups including multi grains, meats, dairy, fruits and vegetables. Portion control is important and here some general tips for per portion and total servings per day = ½ cup for all starches (8-10 servings a day) and vegetables (2-3 servings a day); one piece of fruit or ½ cup of small fruits (3-4 servings a day); 1 cup for low fat dairy product (3-4 servings a day), and 3-4oz of low fat meat a meal (12ozs total a day). Remember to drink plenty of fluids daily and take your prenatal vitamin pills. When you are breastfeeding some foods that produce gas (cabbage family, onions, broccoli and beans) may have an effect on the baby, so just eat small amount or avoid them. Hoped this helped you.
Avoid all junky foods, fast foods, coffee and also if possible avoid chocolate too. Add more healthy foods like green leaves, vegetables, all seasonal fruits expect papaya and pine apple. And also add more diary foods.