Getting back on track

Yesterday was one of those days where I have been lazy.  I was demoralized because I feel like I have regressed instead of making progress.  I also feel like I need to give up and get off.  I joined Weight Watchers and I feel so alone in this.  I have been eating unhealthy food and thus I feel as if I need to get off of the bandwagon.  On the other hand, I feel great about the fact that I am "lucky" enough to not have the complications.  That is a wrong attitude to have.  I have been demoralized.  How do I get out of this funk and this mindset?