Unless the child is living in an abusive home, you should be fine.
My wife also felt similar during her pregnancy. Partly because of all the hormonal changes that were going on. Partly because her maternal instincts were kicking in, so she became very protective of our baby. A child will undoubtedly bring a lot of changes and new responsibilities into your life, so it's unsurprising that you'd feel stressed out.
I'd say that your feelings aren't too far out.
What stage are you at with your pregnancy? My wife was at her moodiest during her second trimester.