Girls, I have a strange unexpected situation here)) My son doesn't wan…

Girls, I have a strange unexpected situation here)) My son doesn't want to take the right breast. He eats from the left normally, but the right one he just can't - for a full minute and throws it away, and even gets angry, roaring like a tiger ? Yesterday everything was fine. Do you think this is some kind of tantrum and how to deal with it? In the evening I even emptied it, there's milk building up and it's not pleasant anymore ??‍♀️