Hi Nikki
I agree with the others,,,you are a great mum, and i am sure that things will work themselves out. I too am facing a 4th child, and wondering how to manage, but I know that my other boys will just have to adjust,,,or adjust to me throwing away what they wont pick up lol.
It also sounds like your hubby is quite capable of helping out when he can, so I would take full use of his help whenever you can.
Best of luck hun, and I am sure you will get things running smoothly in no time