Lulani, I have been where you're at. Everyone says that you should eat at least 1200 calories a day to lose weight. That seems absurd. Calories in vs calories out and such...Less is better, right? BUT.... I was hangry, exhausted, my hair started falling out, I was for real having all kinds of problems at my 800 calorie a day diet. Although it was suggested here that I eat more calories (Seriously, these people rock!), I was doing low carb and was having a hard time keeping carbs low and getting calories up to 1200. Plus, it didn't make sense to me, so I mostly ignored the advice. I finally gave up, gained everything back, and felt like crap.
Now I'm hardly an expert, but at this point I'm eating about 1500 calories a day and losing fairly steadily. Granted, it's only been a couple of weeks, so I'm no expert. But I didn't listen to the "experts" anyway, so.... :) Just saying, I am a convert. I do think by eating so little, I jacked my metabolism up something fierce. Now that I'm eating like a normal person (cuz seriously, 1500 calories a day is pretty easy for someone my size), I feel like a million bucks. And I'm losing a pound or two a week. I wish it would happen faster, but if the time is going to pass anyway, I may as well lose slowly and be a happy and comfortable person doing it.
Good luck!!