Okay, my day went a bit better this afternoon. I found out that another coworker of mine stuck up for me at work when I was asked by my boss what happened with the gal I was training and quit while blaming me for quitting. My boss later came over to me and told me, "If she wasn't happy here in 2 days, then I doubt she would've been happy here in 6 months. Her leaving is probably for the best.". Made me feel a bit better about it all.