Ok babe...
I don't thing there is a way for me to say this without it sounding harsh. But you know me and I'm upfront and saying it outta love.

I think your DP needs to back off. . .
Go get some counselling. . . Great idea N2L
Go easy on her, she's just had a huge upheaval.
The more tension / fighting around her at the moment will just make her feel like shes more alone and not at 'home'
Your DP needs to get over the fact that you are tired and there is no "alone time" it's not like before where he had you all for himself, your a mother and they come first.
Go easy on her hun xoxox
The thing about this issues is that they are all fixable, they just need time and work xoxox