Great job on the cleanse and losing all that weight! I think like others, you should shoot for 1200 (regardless of your schedule) and allow yourself up to 1400-1500 for when you are hungrier. I know you're night shift and get hungry around 2am. Maybe have a healthy snack around then.
I eat 1200 and sometimes slightly falling below, even if I'm working out 6 days a week. Occasionally I go up to 1400. I know it's not supposed to be good to go so low, but it's working for me.
good luck!
