There is no way to give an accurate answer unfortunately without knowing a lot more information about your circumstance. Were you an avid exerciser before you started this training 6x per week? What kind of training are you doing? Cardio? Weight Lifting? Both? When you exercise and stress your muscles your body will actually hold on to water to repair them, thus seeing a spike in weight due to increased water. I have found after I increase my workouts (even cardio - i.e. run a minute/mile faster or add 1+ miles to the distance) that my weigh in for that week does not show a significant decrease. However, after my body has become used to the new stressors I place on it the weight sheds.
I might suggest you take it easy for your next week, maybe go down to 3x per week (a rest day between workouts) and see if that drops the weight (the # showing on your scale). You could also invest in a sewing tape measure and keep track of your measurements such as neck/chest/stomach/waist/thighs. I have also found even if I don't lose that much on the scale my measurements continue to drop so I keep plugging along.
