Im glad you put some more calories in there. 12-1300 calories is way too low for your age/weight. Like prev stated, it will cause your body to slow calorie burning. 3lb a week is a great fast pace to lose. About the maximum you want really.
A great tip if you have the patience, is get a program and track everything you eat/calories taken in. Find out what you need to maintain, and nock about 1000-1400 calories off of that, That will probably put you in the 1400-1600 calorie intake range + whatever you burn in workouts. So if you burned 500 calories at the gym, you would take in 1900-2100 calories.
The great thing about doing this, is it really opens your eyes to where your calories are comming from, and you will realize how important fruit and vegetables actually are in a balanced meal plan.
We all know that vegetables are good for us, but when I started tracking my calorie intake i was floored at how good they are. You can eat lots of great vegetables for very low calories. (Cucumbers are godly) So i take foods I really like (chicken for example) portion out a suitable amount, and use veggies to bump it up to a nice size meal.
And for snacks.... well, that takes real discapline
. Mine is now apples/oranges/poprcorn(no salt or butter) Or if I really need a fix I take a whole english cucumber, dice it up, fry up about 2 egg whites and 2 tblsp of caloriewise zesty italian dressing (5cal / tblsp) and for less than 100 calories you have a meal. Remember tho, the sodium is a little high, and its 95% water so you will get hungry fairly soon after, but it will get you thru that NEED TO FEED. And keep you going untill that next regular meal.