you might have hit your healthy natural weight already, over dieting and over exercising at this point could be hazardous to your health without more information. Remember your "ideal" weight goal might also be something that's never achievable through good diet and exercise.
Since most ideal weights are like BMI and numbers set on a inactive lifestyle, if your extremely over weight using diet and exercise will put on a good amount of muscle weight. If you look good and feel good don't get discouraged on numbers. Go to a gym and ask them to use the body fat analyzer and see where your at. Remember to do this before a workout for more consistant results. if your between 15-20% for a woman your doing amazing, even under 25% is great.
It is strange to think, I haven't seen you since a month. I have seen the new moon, but not you. I have seen sunsets and sunrises, but nothing of your beautiful face. The pieces of my broken heart are so small that they could be passed through the eye of a needle. I miss you like the sun misses the flower; like the sun misses the flower in the depths of winter. Instead of beauty to direct its light to, the heart hardens like the frozen world your absence has banished me to.