Leah, you oculd be talking about my baby there. You poor love. The other girls are right - screw the housework - the house will NOT fall down, nor will the world stop. That is coming from someone with OCD - I didn't have a choice either. I became best friends with my baby bjorn.
Have you got someone you could ask to come over and help you? Either to nurse or to tidy.(Hell If you're desperate I'll take a road trip to help you).

Could that person make a couple of meals and freeze them for you so all you have to do is thaw something for dinner?

Could you cook and freeze some stuff while your partners on his days off?

Do you wrap her? Does her top sheet fight tightly? Darcy is always better when she feels very well wrapped and almost tied down LOL (mean mother I am - but it works).

When you see her tired signs when she's awake, do you put her in her cot? She might scream, but stay with her. SHHHH loudly and pat her leg/bottom. If it doesn't work it doesn't work, but it's worth a try.

It DOES get BETTER. Darcy was a totally different baby at 12weeks. We went from 5hrs in 24 to over 16. I know the light is very dim from where you are in the tunnel. I really do.

When I read my diary from about that age with Darcy, I am sad that at that stage I felt her a responsibility. I loved her somewhere, but I was so drained. I was honest and told my nurse. I did have PND but no matter what you have to be honest. No-one has ESP and can't offer help if they don't know you're drowning. Ask about settling centres where they can teach you.

Feel very welcome to send me an email.
Hope a little bit of that rubbish helped. I didn't mean anything to be bossy or offensive.