I don't feel that way anymore.
I was standing at the sink, washing collard greens for dinner (which was scrumptious by the way) when I heard clear as a bell, "Never Give Up!".  I could be going crazy, with all the stress I've put on myself, I'm not ruling it out.  But I realize at that moment that this was probably the first time I didn't contemplate shutting down my shop.  I was frustrated and a little depressed, which I'd been before.  But this time I wanted desperately to know how to make it better.  
That made me smile a little.  I won't give up.  I don't think I can.