I agree with the fat information but you probably shouldn't go under 1200 calories. It puts your body in starvation mode. Your body thinks its starving and will hold on to each and every calorie to make sure it has enough for later.
December 2005-lowest weight of 148.5
Start weight Ocotber 2010-186.6
Current weight 178.5
GW-140 April 2011
Try mypyramid.gov. It will tell you if you are eating enough fat/protien/carbs and nutrients. Also, Amber is right, you shouldn't go below 1200 calories. But you were close, and as long as you eat enough the next day (like 1300), you should be OK.