Breastfeeding problems

So my DD is now a week and two days old and still can't get her to latch on. She showed interest then pushes away. I went to a breast consultant yesterday and she worked with us for about an hour. DD latched for 15 min and it made me feel really good. But I get her home and we are back to square one, not latching. 😢 It's really depressing me and I can't pump more than 2oz every time I pump. So we have to give her supplement formula. Just really depressed about it and feel like a failure.

Any advice would be greatly appreciated thank you.