Cag fwiw I think you are doing brilliantly! Agree with Hills that to a greater or lesser extent, I think everyone struggles with compromises, no one does it perfectly. (I could also post horrific photos and I have few excuses!).
And it must be especially hard and demoralising, having been relieved from fibro symptoms during pregnancy, only to have them return again 
And a newborn baby is bound to throw a bit of a bomb (albeit a delightful one!) in to the works and so its bound to be a good while before you can establish new routines and systems.
I am probably talking through my hat here with only 1 DC/pt job, but fwiw, I am terrible at prioritising and have found two things helpful: (1) the Flylady daily focus allocations (adapted to your own priorities) because however mad things get, it is quite comforting to know that on Mondays you have focused on x, on Tuesdays you have focused on y, and in every week (more or less) you have done something (hwr little!) towards ticking off tasks in each area- even 5 mins better than nowt
(2) tip from vv organised mentor of mine - make yourself weekly timetable in half hourly increments and block in: sleep (not that you are getting much currently!) getting up/bedtimes, bath time, meal prep and meals, rest blocks (for yourself) and essentials like home edding hrs, DC extra curricular classes, weekly shop etc. Then you can see clearly what other time you really have available to do chores. And that helps you make best use of that time, or probably (in your case) helps you feel better because it will be clear that there simply isn't that much time available, so compromising on ready meals and cleaning really is necessary for the moment ifyswim!
As I said though, Cagletini is far too young to be shoe-horned in to any set timetable ATM but maybe helpful strategy for future ... . For moment, as everyone says, good enough is good enough. Everyone fed, no-one dead etc! Just do what you need to do to get through. And try and prioritise your own rest however difficult, cos it's a marathon, not a sprint and you are probably in "the wall" bit of marathon right now but in a few years, you will be charging down home straight! 
Sorry that was so long and no I haven't been at the damson gin (wish I had frankly) 