Hi Caz Well done you on your return to work ! I cant help with advice either, as have not yet returned, hope to in the New Year.
All i can say about the housework side is, it will wait, dont do yourself in trying to do everything. When i go back i am going to ask my husband and two kids to help out as much as they can. My kids are grown up, so should not be too much to ask!
Make sure you rest up lots and dont over do it as Rod has just said.
Take care
Love Tina xx