Won't stay latched and fusses

Dara • Ivf for one year...this is try 4.1 bfp with our frozen guy from round 4! We were shocked!
My 9 day old has had trouble latching. In the hospital the nurses helped and also gave me a nipple shield. But we struggle at every feeding. She won't stay latched and fusses the entire time. Our most successful feeding was 10 minutes each breast. Also I have only gotten 2.5 oz while
pumping at the most. Will it get better? How do you stick with it when you feel like your torturing your child? Please help!