Ok so i havent been eating for like 2 days and today i had like 600 calories is that bad?

i'm 16 i weigh 101 pounds and i'm 5'2 and yah i seem to hate food so i havent been eating much and for the last day i havent had anything to eat but today i had 1 orange, some popcorn, a granola bar, some candies and 1/2 a cup of ice cream so all together about 600 calories is that bad