I am in week 3 of the Atkins diet. In week 1 I lost 4lbs and week 2, my weight loss was like a yo yo. I went up 2 and back down 1. Week 3, I got on the scale and it said that I had gained 4lbs. So I am almost back to where I started. Frustrating!!. I am sticking to the diet and exercising 4 times a week for 45 minutes. I can tell that I have lost inches but why is the scale being so unforgiving?