Congratulations Skip so glad she's here and being looked after well and you too! Congratulations on your beautiful baby girl!
Re: pooing. I went once a week for about the first month. Eat fibre and don't worry about it. I lost a lot of blood and had hospital strength iron and the blood clotting injections which also bung you up. Don't worry about pooing, it will come.
Re breastfeeding, I'm so sorry you are having such a difficult time. Keep pumping even if you get nothing off, it's the stimulation which is important, lots of water, skin to skin when you can. Is it possible to have her skin to skin and then get hooked up to the pump, even if she's asleep or drowsy. Get dh to hold the pump on your boob while you nuzzle her? Milk doesn't tend to come in for a few days but it will, please don't worry, don't make yourself ill. You are doing an excellent job, you have not failed at anything, you are both here and will be thriving and well in no time.
Just as an aside, please don't think what's coming out of the pump is what you have, I've never, in 9.5 months of feeding L had more than an ounce of each boob when pumping. Whatever happens, you are amazing, you made a human, you brought her into the world, she is here, you are a Mammy, you are wonderful. 🌸🌹🌷