Also, a little bit of letting you know you are not alone... When I was pregnant with DD2 I was very very angry all the time... rage-y really. I could not stand being touched one more time... ever. She was still waking up 2398529845 times at night... it ended immediately with birth. I was fine.
When I was about 5 months along I got to where I could bite my tongue and walk away and cry and hit something instead of wanting to take it out on dd1. I remember that feeling of wanting to just shake her.... I remember it vividly one time that I actually grabbed her and picked her up in front of me before my senses kicked in and I just hugged her instead of shaking her.
But it did end... and I've never had that with another pregnancy.