When I was preg with #1 I was so snappy and mad I stopped talking to a coworker completely for about 3 months because I couldn't say anything nice as they were wasting the whole day everyday and never did any work. With #2 I got so frustrated with crappy service and food in our small small town's restaurants that my husband wouldn't let be talk to the waitress. This time it has been much better but I don't work outside the home and we stopped eating out to avoid the disappointing meals in our restaurants.

I think if you have a major stress during your pregnancy. Death of a spouse kind of thing. It could effect the baby but I think God has designed things to insulate the baby very well from average daily concerns and hormonal craziness.