Leap advice, etc.

I think my LO is going through her first leap (she’s 5 weeks and 4 days old). She has gone from eating pretty on schedule and falling right to sleep when she is satisfied to eating and then being very fussy for the next hour or two before eventually falling to sleep. After eating I hold her or walk around the room with her, sing to her, like I always have done; but nothing seems to soothe her at times. She has been sleeping swaddled but with her arms free, but we have gone back to full swaddling her because she kicks and flails her arms and hands so much after eating. This happens more so in the late evening and in the early AM than during the day. I have the Wonder Weeks app and am getting some info from there, but would love some real momma input...