Don't worry, Katie. I'm a survivor lone mum of twins who are heading towards their 10th yr now. When I look back on their premature births, the emergency C-section, the need to look after myself being in direct conflict with needing to look after my babies and the huge hormonal surges that made me cry, I wonder how I did it - but you WILL survive and thrive. It's just far too early for you to feel this yet. The hormonal stuff alone is going to make you feel all over the place, emotionally.
Get as much help as you can get and then add some more to what you think you need - if you can. If I had my time again, I'd have got loads and loads more help. I had no family, no partner and no help beyond about 4 weeks of a paid homehelp who made me meals and as a result, I barely got out of the house for the first 5 months.
I made far too many choices that made myself a martyr rather than allowing myself to take care of my own need and realise that it was the quality of my presence that mattered most to my babies, not necessarily the quantity.
If your mum can stay on and help for a LOT longer, that'd be good and also if you could at all afford some extra paid help too, that'd be great too. I wish i'd invested more in paid help, even if it 'broke the bank', as I couldn't enjoy my babies as much as I'd hoped.
I also believe that 'bonding' often doesn't happen immediately - especially if you've hada difficult birth and have been separeted from your babies.
Don't worry. You're normal and doing great. Can your husband not take more time off work? If I'd had a partner, I'd have wanted and expected him to do 50% of everything.
Keep talking to anyone available to support you. I wish that I'd had someone and I also wish I'd known about MN then too, as the hardest part was feeling so entirely alone and unsupported and feeling I was 'failing' the babies I'd really, really wanted. I didn't even have time to attend or connect with the local TAMBA group either - which in retrospect I also regret.
My advice would be to bring in as many people as possible in your daily lives for support on every level and totally accept that you're doing great and are absolutely normal.