Work Isn't Working

Really bad day at work. I'm expected to do a loads of stuff, but my boss is never in the office and even when he is, he's incapable of making clear decisions and sticking to them. I probably should have quit but money is tight at the moment. When I got home from work I sent an email to my boss saying I would be taking the rest of the week off due to stress. Not sure how he's going to react...