I just entered my 3rd trimester. How much more calories should I be eating daily now for 2?

It is recommended you have 300-400 extra calories over and above your daily required calories intake which depends on you activity level. Please note it also depends on your weight before you got pregnant. If ur BMI is higher than 25 to begin with the intake should be lower. Having said that please listen to your body rather than having a strict calorie count. Small meals distributed over the day covering all food groups is the best approach according to me.