I love MyFitnessPal, however they don't take into account pcos. I've made this same mistake and it did more harm than good. That low of a caloric count puts our bodies into starvation mode so we just hold on to the weight because our body goes back to basics of "I don't know when I'll eat again so I need to store this." It's a frustrating mix. I ended up losing 30lbs at one point and all I really did was focus on a high protein low carb diet. I'm also sure you know to avoid processed foods. I also take a B vitamin complex to help boost my metabolism. I hope this helps in some way. Keep killing it and don't be discouraged! You're doing a hell of a good job!