Welcome aboard! During my depressions I have a tough time even getting out of bed. I'd like to take a shower and get dressed, but the mere thought of getting in the shower is too much for me. If it's a school day, I just get dressed, even though I'm not freshly clean. In the winter, when my depressions hit the lowest spots, I can go a full week without a shower, or even getting dressed. (After that, I can't take the grunge anymore and get into the shower.)
You are definitely not alone.