Screaming during feed

Shelby • Mama to Teagan (11/4/19) , Callum (7/10/21) and fur mama to Hoover! 🥰🥰🥰

My 12 week old has recently started pulling off and screaming about 3-5 minutes into the feed and then will be to upset to relatch. Any idea what this could be???

I’ve tried burping and leaning back while feeding her because I thought my let down might be too fast but nothing makes a difference. She will generally not want to eat until like 30m or an hour later so this turns into like an all day event