Based on recent studies here is the new scientific method to achieve an accurate assessment of your current body weight.
Keep in mind that if you are a chronic scale user/weigher that you cannot expect things to change every day. If it goes up today you freak and tomorrow if it goes down you are happy, but then the day after it's back up some so you freak again. That's such a mentally draining cycle.
When you are exercising, especially when you begin, you will be gaining both muscle and water weight due to an inflammatory response from the exercise trauma. You might notice a little scale increase while your body's circumference measurements, as well as body fat percentage, drops.
Be aware that the scale will never tell you accurately whether you are growing healthier or not. My recommendation is to stay off the scale and give yourself a mental break, eat clean, and KNOW you will experience the fruits of your labor- the results of your goals. WIN!