Winky girl you've had lots of fab advice ! I won't repeat it except to say
NO CHORES
Except maybe just throw washing in machine (dh + mum can unload, sort, iron etc)
If you don't have enough help with cooking, buy lots of top quality ingredients that you can just assemble rather than cook, eg farmhouse cheddar, good parma ham, deli salads. Will be healthier than ready meals.
And SLEEP IN THE DAY. Getting outside is great for morale, but sleep comes first. In a week or two you'll feel so much better.
Trust me. After ds1 was born (failed induction , nightmare contractions, 2 days in hospital without sleep before he arrived, failed epidural, huge episiotomy etc etc) I felt utterly low and hopeless. Cried loads...Developed some kind of post pregnancy stress based hive type itching over my whole body. Even got mastitis twice in the early days. in short, it was all really shitty !
But really soon I felt transformed. Not because he slept well or anything, but your hormones will subside and soon even the hard bits seem manageable.
BUT YOU NEED TO REST TO SPEED THIS PROCESS UP.
I now have 3 other children too, inc 2 home births. I got better at pacing myself in terms of chores etc and felt great sooner and sooner after each one.
Last time dh (who is in a demanding "long hours" profession) had an unbreakable work commitment starting 3 weeks after my due date. Ds3 was a week late...for a fortnight i was utterly pampered - no cooking, no chores (maybe just a bit of laundry) and definitely no food shopping ! I almost got bored just seeing to the newborn, but I knew I'd have to cope with 4 kids and all that entails, just 2 weeks after the birth. Well I'm here to tell the tale. I was doing everything a fortnight after the birth; the trick was I'd had almost total rest leading up to that.
Good luck.