Stressful 2nd pregnancy turning me into a terrible mother...please help!?

You need to talk to your doctor about this now. You are most likely developing depression which will just get worse after the baby is born. I did with my second child and I almost drove us both off a cliff and killed us in the car I had got so bad. It took me two years of medication to get me back to normal and it was real hard. I am pregnant with number 4 and I get anxious sometimes but I just have to calm down. I remove myself from the situation before I get stressed out. I have even had my neighbors come sit with my kids so I can go calm myself down and focus on the important issue which was not that my other kid had knocked over a gl of water and I was mad that I had to clean it up, I had to take time to think and realize that I was the one with the problem, you just did this so you know that you need to talk to your doctor who can put you on meds to correct this. Your not evil! Alot of women go through this and it is not uncommon at all, but the violence has triggered you into you need help mode and that is good. Get help now before you do something like those women that drown their kids and such and spend the rest of their lives in jail because they failed to get help. Good luck to you!