You could just replace the names and you have described me!

My poor kids havent got a mother at the moment they have a grumpy, snappy, angry, B$%#chy, sh$%ty women that has moved in.
I feel like I am wound so tight and I can seriously snap at the smallest of things.
My poor
DH has been trying to keep the peace and bites his tongue so much im suprised he even has a tongue left!!!
I do have very small windows where I do feel somewhat normal and these are the times I make sure I praise and show my kids love as much as possible before something annoys me again and I lose it.
I am lucky in that my
DH has been through this 4 times before so he is well trained and very practised. Make sure you let them know that you are not meaning to be so awful and that you do know you are being unreasonable but you truely cant help it and its not fun for you either.
It does come in phases and sometimes will be better than others so accept it is going to happen and dont be hard on yourself when it does.
Just another one of those pregnancy joys.