Crying while breastfeeding

My LO is 6 weeks old EBF. She will get fussy and I’ll feed her and while I’m feeding her she will take her hand and pull my nipple out then cry as if she’s hungry and not getting enough. I’ve tried to take her off and burp her.. no gas. As I’m feeding her her eyes are heavy. Do you think she’s just tired and fussy? Or is it her belly😭

She just did that and I rocked her to sleep and now she’s sleeping.

(Also, I’ve noticed she used to have about 6 poops a day and now she’s down to 2 a day) does it change as they get older?