First baby recovering anorexic

If my dates are correct im 6 weeks 5 days. I am a recovering anorexic. I have read that in the first 2 trimesters you do not need to eat more than your daily intake of 2000 calories. I have not ate more than 1400 calories a day for over a year, will I need to bump this up to 2000 as I have maintained on 1400 and under for over a year.