Depression is such a punk.  It popups up and doesn't care if its mild or debilitating its happy to be either.
I just realized I broke a huge project that we've spent almost 1.5yrs working on and its broken bad enough, and there's been enough changes done since we know for sure it last worked that my head is spinning.
My chest hurts, my heart hurts.  You'd think I just lost a loved one! *sigh*