depression and anger...

I know that pregnancy causes emotions to run high. I understand that hormonal emotions are often times irrational, but lately I have been so just down and angry. About everything. Anything that my boyfriend does just pisses me off. Anything the kids do just pisses me off. And there are reasons. But I get treated like I am being the worlds biggest b@*#h and that just makes me even more mad. Then I get depressed because I can't tell if I'm really being crazy or if everyone is just being ridiculous and I don't want to be that girl. I can't talk to anyone about it because we agreed not to say anything until we go to the doctor this week and I am going insane.