Lorrymac, I can't really help I am afraid but just to let you know that you are not alone! I leave the house at 7am and get in around 5pm from, and, like everyone else, have the usual chores to do - although my fella does help as much as he can and I rest my feet as much as I can I still end up with feet and ankles Shrek would be proud of.
I did read that wearing a low heel can help with regard to backache, but even a small heel is giving me severe coccyx pain so I am in total flats at the moment (and have been since 23 weeks - I am now 27 weeks).
Isn't pregnancy a blast?!