FLTC, as for the being angry at the smallest things, you may want to take a deeper look. A lot of the times it's just a symptom of something MUCH deeper. She could be harboring some sort of built up resentment that leads to nitpicking any and all unrelated things. I know my W definitely did that for the longest time because she was angry at me for the way I've been treating her. It became overwhelming for me and I eventually just tuned her out and shutdown. And then she finally stopped, and that's when she became the WAW even though I thought things are getting better due to the fighting stopped.... In reality when she was nitpicking, it's a way she's screaming at me that something is wrong.... Maybe your wife just like to nitpick, but it's something worth doing some digging.
M: 31 W: 31 M: 7 T: 8 S:4 D:2 Bomb dropped: too many to count or remember, 12/17/07 last one S on 9/2/07 W sent off D papers 12/31/07. Me trying to live life and hope she returns one day.