Every weekend for the past few months (I forced myself up for work because I wanted to keep my house, car, tv, etc.). I knew what I had to do, just couldn't do it. It was even a struggle to make myself go to the bathroom when I needed to. The only time I jumped out of bed was when my delivery guy rang my doorbell because I couldn't even get myself to make anything to eat sometimes.
This past weekend is when I finally left my house and took a shower both days!! But what worked for me was being in contact with my pdoc about exactly what was happening and making adjustments to my meds as she said. Then I got back into therapy and that helped me to change some of my negative thinking patterns.
I hope you are able to feel better sooner rather than later. Being in that depressive hole is a horrible feeling, so keep working on taking care of yourself.