Girls, hi! My son is sucking his thumb for the last few days, he reall…

Girls, hi! My son is sucking his thumb for the last few days, he really doesn't want to take the breast only at night, he takes it well in a half-asleep state during the day. We have a tantrum every time. He sucks on his thumb, cries that he can't get milk, I give him the breast again, he has another tantrum, he doesn't want to suck, sitting down, barely giving it a maximum of 10 minutes, he sucks or falls asleep or has another tantrum. Kcal dark green, are they teeth or a false refusal?