Silvia, I've had the exact same experience. From reading all the comments on this daily forum, I think that's totally normal and happens to everyone. By my second week I lost 6 pounds but had NO energy and could not work out. SO, I stalled I thought and yesterday realized I had lost inches when I tried to put on my suit for work. What an incredible awesome surprise. So now I am getting my energy back at week three and was able to work out this morning. Have lost a total of 8 pounds and a dress size. Hang in there. But ofcourse if you feel really bad be careful. Jenny