No one seems to tell you how hard it really is...yes, my body was in a right state both times and I recovered (am recovering from DC2). 4 weeks is still early, this time next week you will feel much better, and twice as better the following week.
I didn't keep my chin up too much TBH, just was very kind to myself and wore my pyjamas a lot, and accepted every last bit of help that anyone offered. Oh, and didn't worry if the house was a mess and did all my food shopping on line or sent dh out.
On a practical level, would fibrogel help, its meant to er, 'loosen the stool' and make the whole thing easier and less painful on both the piles and the stitches. Also, wearing a mighty and letting the area get as much air as possible is meant to help too and perhaps going commando (in your mighty) if you can helps.
Bio oil is good for getting rid of stretch marks and lathering it on make you feel like you are doing something to help.
The swollen hands and feet do go. I had a dreadful time, my mantra was 'this too will pass' and it did.
Hope you feel better soon, if you feel to rubbish have a nice cuddle with your wee one (the one bit of advice that the HV gives that you should definately ignor is that it's bad to let your baby go to sleep on you, it's the best thing when you are feeling crap IMO).