Body Fat % Mean Im done losing ?

Keep in mind that if you eat too few calories it could also cause you to plateau. If you set up MFP right to start with then the daily calorie goal that MFP gives you already has a calorie deficit built in to lose weight. That said, you should eat close to the calorie goal MFP gives you each day including eating back most of your exercise calories. If you are too far under your daily calorie goal you are very likely to cause your body to hang onto the fat it has by either slowing down or even stopping fat loss. It may not happen right away but eventually you will most likely plateau. If you have a lot of weight to lose you can probably get away with it longer but as you have less to lose your body will plateau easier. May sound counter-intuitive but that's just the way it is.