Mindy,
I think others have said it, but I'll repeat it. The Program does push making sure you fix each "area" one at a time before moving ahead to the next. The first was nutrition and sleep for me. Many have heard my rant before, but I'll repeat it. I spent 3 years changing each area of my life before I was completley "following" the plan. You seem to be in a more burnt out state than I was, which is why I think this is more important for you. Unlike other "diet" books, you don't just jump on the bandwagon and start to follow SP. A lot of it is about making the changes and helping more body to heal over TIME. So I would pick a few things you need to change. Substituing sugar with fruit, moving from coffee to tea, pick some things and set weekly goals. Don't start with a new change until the initial ones have ingrained themselves into your lifestyle. This takes time, but you can do.