Eating net calories? 1200 a day?

okay i was stuck at a weight loss plateau, eating 1200 a day and about 700-800 NET. so someoen said i was in starvation mode i need to eat 1200 NET a day but i'm still gonna keep working out so i burned 500 at zumba tonight & i had a protein shake after but i have 331 calories left and i'm seriously scared to eat them. i dont wanna gain the weight back. i'm 5'6 and 156.5 right now, started at 166 about a month ago. what should i do?