Sounds like you're doing all you can, so firstly hats off to you! You've had a really rough time and are doing amazingly. Also, don't panic - you're daughter is getting fed and plenty of nutrition, and that's the main thing.
I breastfed our baby for 4 days, then swapped to formula for a week and pumped (I was on medication which meant I couldn't feed), the mixed fed for a few weeks and a now breastfeed with a bottle of formula at night time, so I know a little about both and combining.
I've found speaking to La Leche League and NCT feeding helpline really useful - you could Google their numbers and give them a call, I found them full of ideas and very supportive. A visit with a breastfeeding counsellor (ask your local NCT) could be helpful too, to see you both in action and offer advice.
In terms of supply, It's said that a baby is far more efficient at drawing milk from your breast than a pump, so baby might get the milk flowing better than a pump could when she eventually feeds. A pump doesn't get all your hormones flowing in the way a baby does, which are essential when feeding, so you may find your supply will gradually increase once she does feed. And don't forget at this stage your supply would be relatively small in any case, as your baby only has a tiny tummy :) If she does start to breastfeed you can increase your supply by feeding regularly and supplementing with formula as need be, so don't worry about that.
In terms of encouraging her to breastfeed, could you try giving a bottle of formula in the position you would would breast feed, to get her used to the idea of feeding lying sideways? By which I mean lie her across your chest, doing skin to skin perhaps, and tilt the bottle sideways? Might be worth a try?
You could also try varying your breast feeding positions, eg lying her on her back and leaning over her, or 'rugby hold' etc.
It would also be good to try letting her latch on between her feeds or at the end if a formula feed when she isn't too hungry, so she'll likely be calmer and more likely to persist.
Also remember your mood is transmitted to her. Take some deep breaths, release your shoulders and loosen your muscles, smile (it fools your brain into feeling happier!) and remember if it doesn't work this time, you can try again in a hour or two.
If you have a partner, rope him / her into helping out too - checking her position, encouraging you, etc.
You could also make sure you're using teats which mimic the nipples as closely as possible - I use Tommee Tippee Closer to Nature size 1.
Also, do give yourself and her time - I don't know whether this if is your first baby, but whether first or subsequent, it takes time for the two of you to learn to work together on feeding, and time for the baby to learn the ropes - I only stopped having to encourage and 'coach' my little around a month ago, and she's just over 4 months.
Good luck and keep calm - if your baby is getting fed, that's the main thing!