Girls good night everyone ? My son is 5 months old and the thing is th…

Girls good night everyone ? My son is 5 months old and the thing is that since 1 month breast milk pours out like a fountain (I can't hold it with a bottle, milk comes out in huge amounts even if I hold the bottle, after air it still pours out, sometimes as cottage cheese), and he's hungry again, and we start all over again and go in circles, we have seen all the doctors, everything is fine, but I don't understand what's happening, and his weight is low, we switched to formula, and it turns out we are on mixed feeding, tell me please, is mixed feeding normal at all? He eats mixture all day (we get used to it somehow), and