bumper do you have any cartons of formula in? or could DH nip out and get one? then you can give yourself a bit of a rest, and once won't hurt her. You sound like you need a break.
and Not much help to you now I know but I got some of those Avent storage tubs with the adaptor for the Avent pump. They are presterilised and have a screw top lid and stack quite nicely. If you use Avent bottles they can screw onto a teat via the adaptor as well. They can be re-sterilised as well for re-use.
Another tip is to stack your bags of EBM in a tupperware tub to keep them upright.
....but like I said, not much use to you now