definitely, you do not want to go below 1700. the fact that you're comfie at 1300 is probably a sign that your metabolism has dropped. get that food in!
that whole "listen to your body" thing is, imo, utter rot. if i listen, my body says "SUGAR! NOW!", no matter what time of day it is.
eat every
three hours, by the clock. greenies (salad and other
green veggies like green beans and broccoli, basically) are free food - eat as much as you want.
keep tab of how your clothes are fitting - if they start getting tighter, walk an extra half-hour a day.
yes, you HAVE to get the exercise going NOW. just cutting back food will make your body cut back on active tissue because there's not enough fuel to support it all and your body doesn't need it because you're not using it anyway.