cheebahmunkey - don't stress over it so much.
Comparing any two scale weights is not very meaningful - your body weight changes hour by hour, and not always because of what you've eaten. I weigh myself daily (and record it in my program), and over the past year I've seen daily weight "gains" of up to 4 lbs, and daily weight "losses" of 3.8 lbs. Daily body weight fluctuations can be caused by hydration levels, bowel movements, salt intake, food intake, menstrual periods (if applicable
), etc. It's the longer term trends that are important, not the day to day numbers.
If you're really only consuming 1100-1200 calories per day, and exercising, you're almost certain to be losing weight. You may, in fact, be losing weight too fast and/or not getting enough vitamins and minerals at that level.
If you'll post your current height, weight, age and gender, I'll run your numbers through some of the analytical tools in my WeightWare program and give you some empirical feedback on where you're at, and your estimated metabolic rate.