Fussy after eating?

My baby is currently 5 weeks and for the most part I exclusively pump and a few times a week I’ll breastfeed. I use the medela bottles for his feedings. I’ve noticed within the past week after his feedings he becomes fussy. I know he’s no longer hungry because he doesn’t do his tongue clicking (like sucking on a nipple). After about a few minutes of doing things to calm him down he stops and everything’s good again until the next feeding and it’s all over again. Has anyone experienced this? I’m going to bring it up at his appointment, but it’s not until October 19th.