Motivation

Recently I've been struggling to get out of bed.  I always try to be conscious of what I am capable of daily, but for the past month its very clearly becoming less and less.  Doing my best everyday is the most anyone can do right? But I feel like my standards for myself have gotten lower.  Something about me is that I spent 8 months in a rehab facility.  During that time I learned many techniques to keep myself on track.  Yet, I feel myself slipping back to where I was.  It's disappointing and confusing...