Anyone else's babies born around the 18th eating more recently?

Feeding has been a major struggle since she was 3 weeks old or so. And around 2.5 months old she stopped eating so much, around 2 months old she was having 4 to 4.5 ounces of milk (pumped milk or formula) every 3 hours or so, getting between 20-30 oz in a 24 hr period. Then she started eating between 2-4 ounces every 3-4 hours, and only was eating between 13-18 oz in a 24 hour period, that lasted until 2 days ago, she's been getting between 21-24 oz. She will be 5 months on the 18th.

And while still on her growth curve, she is quite small. Born 7lb 1oz and currently she is 12lb 8oz. But feeding has been so hard.

All of a sudden the last 2 days shes been drinking 4 oz consistantly every 3 hours during the day and 2-3 feedings at night. And today she has been doing the same but with 2! 5 oz bottles. She had 29.5 oz today, I'm so happy!!! I hope this continues and she starts to chunk up!!!!