Breastfeeding Dilemma

Mommies, help me out! My baby is 11 weeks old, was barely preemie born at 36+5, but because of HELLP she was measuring at 33 weeks and only weighed 4.10. Her tiny mouth had a hard time breastfeeding since day one so she’s been given expressed breast milk. However has thrived since day 1! She still has some trouble breastfeeding. On a good day she will get 1-2 solid feeds in, while others she will only latch for 20-30 minutes. For 24 hours straight I want to completely omit all bottle feeding and only allow breastfeeding. Is that to extreme? Does anyone have any recommendations?