Selfcare: If you can wait another week I would just see...It is so hard to know. I guess if I would eliminate either thing it would be the splenda...then see if that helps or not. OR just keep going and see if it starts to go down in a week or so...I have heard of others not losing right away but then losing slow and steady all the way to goal. When I first did the plan I had coffee and sf creamer everyday (more than one too!!) and I lost very well. But that was also several years ago ( like 4) I am not as in shape now either so I have cut the coffee out.