Help! What's up with my baby?

Obie-One 💙💑👶

My baby is almost 6w old. This past week he has been difficult during feedings. He will larch on just fine, but 2 minutes in he will start to frantically start grabbing at my chest. And every time push himself off. Then cry I'd I don't put him back on. It will get to the point where he will cry even if I put him back on. I've tried to burp him, change positions, switch sides, always the same. Sometimes we will switch every 5 min. I will keep putting him on until he won't latch anymore. His poop also has turned a darker mustard color and has been more mucousy/runny. He has no temp. Am I not producing fast enough? is it a growth spurt? Please help, feeding has gotten so hard and I can't seem to ever make him satisfied.