Yep, I've been there, too. Not much fun, is it. Hang in there - it will improve! First of all, relax about the housework - it will wait. Or get help, if it really makes you crazy. Co-sleeping is definitely a sanity saver. I nurse in bed, and just fall back to sleep again until baby starts fussing again.
Also, try wearing your baby in a wrap or snugli or something like that when you are up. They seem to settle better that way.
One other thing that my midwife mentioned - she said she's had mothers from all different backgrounds say that it works, even though it sounds totally bizarre. Try turning your baby over in a complete somersault. Crazy, I know, and I haven't tried it, but it certainly won't hurt, and as I said, apparently lots of women say it works when bubs has their days and nights backwards.
Hope things improve sooner, rather than later. All the best!