Be kind to yourself, OP.
As someone who went through months of round-the-clock expressing, failed tongue tie snips, and severely deformed bleeding nipples with both my DC, I would suggest you despatch your DH/mum/a friend to the shop now for formula and work on getting your DD to take a bottle. Life is too short. Bf is important but it isn't the be-all and end-all, and you sound desperate.
FWIW, I got over the initial issues with DC1, and he eventually bf for a year, but it took three months of pumping, waking up throughout the night to pump and feed, and constant agony from nipples that never healed (one is still deformed now, 7 years on) I honestly wonder if it was worth scarificing those early days. I have no happy memories of him being tiny.
With DC2, we endured the same, but only for two weeks. After her failed tongue tie snip, we switched to formula, and it was the right decision for us. I know it's purely chance, but she's also far healthier than her big brother who had a full year of breastmilk.
The most important thing is that the baby is fed. If bf isn't working, then formula is fine. It really is. I just wish I'd admitted that to myself years ago.
Good luck, and look after yourself 