Help a mom out

Pa

Ok so last night was awful! My 3 wk old has been doing super at night waking to eat and out again! But last night she ate and started to get really fussy, a cry that sounded uncomfortable! When she did stop I tried giving her her pacifier and she kept bobbin her head around with her mouth open like she was still hungry! And then after about 2 min she’d cry again for abit and stop. And for most of this her eyes were closed like she wanted to sleep but couldn’t! What does it sound like to you? Upset stomach? Gas? Not getting enough milk? Or all 3?? Also how do U know if something you’re eating is affecting your milk? Help me!!!! Pic of my sweet Madison