Buckets of empathy/sympathy for you OP.
I’ve got 1 month old twins. They were born 5 weeks early by emergency c section (was meant to be a planned c section a couple of weeks later, but issues were picked up at routine scan so they had to come out earlier), so fairly similar story to yours. 10 days in SCBU, which were hellish, as I had an older DD at home, so time was split between special care and trying to have some time with my daughter (who was upset as I had disappeared rather abruptly weeks before she had expected it).
Breastfeeding has been rocky so far. I have plenty of supply (had massive oversupply with my DD, and found it incredibly easy pumping while in hospital), I’m very lucky in that regard. BUT twins were too small/weak to latch well. They were fed by tube rather than bottle in hospital as I wanted to breastfeed. But after 10 days in the unit they were well enough to come home, except they couldn’t come home with the tube still in and couldn’t maintain their weight by breastfeeding. So we introduced bottles to “top them up”. Since then, one twin has combination fed quite successfully, but one is less good at breastfeeding and now takes almost everything via bottle. He has expressed milk during the day, formula at night - although I have plenty of supply, I just can’t find time to pump enough!
One suggestion I was given by the neonatal nurse was to mix breast and formula in one bottle - the breast milk contains enzymes that partially digest the formula, making it easier on babies digestive system (although I don’t know what the exact issue your babies had with the formula - was it the milk itself, or bottle feeding?)
Tandem feeding is a bastard. Mine cluster feed in the evening. This was going quite well for a while, but one twin is now refusing to feed in rugby hold.... so evenings are often quite disasterous, with a lot of crying, which then wakes my DD..... I get stressed when I see 8pm approaching as I know all hell is going to break loose.
My section wound felt MUCH better by 3 weeks. I don’t think your bleeding should be that heavy. I had little bumps, they were from the adhesive from the dressing, which seemed not to suit me - is that where yours is itchy? Phone your GP and insist that someone checks your wound - it’s possible you have some level of infection, which would require treatment, and the sooner the better.
I’ve been finding the nights not too bad (twins are still pre due-date, so actually don’t sleep all that badly so far... waiting for it to get much worse as they get harder to settle and wake up for reasons other than hunger!). I don’t express at night - I breastfeed them if possible, and have bottles of formula made up ready I case I need them (sounds like that parts not possible in your case). Having a full tummy from the bottle seems to help them sleep better than just feeding from the breast night now, hoping that changes as they get stronger. My DH helps, but he is really struggling with being tired at work, and that is causing lots of arguments.
Do you have any family support? My Mum is coming during the day, and I am totally reliant on her - the twin who feeds less well won’t fall asleep on me (because I smell of milk I think), but will nap on her, so that gives me my hands and time to express.
Buckets of sympathy OP. I think I feel more normal than 2 weeks ago, so hopefully you will too. Fingers crossed it’ll get even easier over time. 