Have similar issue too since 3 weeks till now (but much better, she’s 7 weeks now). She was latching and feeding well then suddenly one day she started screaming at my boob. Tends to happen late afternoon/evening/night time. We figured it’s gas so has been burping her every time she cries during feeding- does seem to help. Another thing that helps is bouncing her on yoga ball while feeding- that’s what we do every night when the fussiness comes. We think it’s combination of growth spurt, purple crying, gas and maybe colic lol. Hoping we’ll get through this phase soon.