My little lady isn't gaining weight. She weight 8.6 at birth. Then when she was 4 days old at her 1st appointment she was 7.16. Then at her 2 week appointment she was 7.15. Today she is 3 weeks old and we had to go in for a weight check and she was 8.0. I had just fed her about 15 minutes before her appointment. I've given her formula a few times. When I pump I usually get between 2-4oz. So I know I am making milk. I'm really trying to EBF but I haven't been able to since she isn't gaining. She isn't a fussy baby. I try to feed her every 3-4 hours or if she seems hungry I will feed her whenever. Last night she slept almost 7 hours. I didn't realize it until I woke up and saw the sun. She is a great sleeper and impossible to wake up. Sorry for the novel. I feel bad for her but I don't know if she's hungry. Any tips besides supplementing formula. Of course I will supplement if needed.