indeed, it's too low. How many times/week do you train? Lifting? cardio?
You should be eating @ the 2700 cals/day range, to make this sustainable. Sure, eating 2000 you WILL lose weight, but your risk or dropping LBM AND stalling very fast is too high.
Increasing calories will help you drop weight at a reduced rate, but if your training is on key, you will not lose LBM.