I have an 11 day old who has been fussy about nursing since day 1. While things have gotten somewhat better, he'll only nurse on one breast. I've been pumping lots (8 times a day) but not expressing enough (about 15 ml on average for both breasts). Lately though my unused breast has been expressing next to nothing! I'm concerned that it is not making milk anymore and that I am not making enough milk in general. Any thoughts on what I can/should do?