Good evening! We've been at it for 1 month and 3 weeks. We have such a…

Good evening! We've been at it for 1 month and 3 weeks. We have such a situation. For the past 3-4 days we're really struggling (we've never experienced this before). She starts sucking on her breast with a fit of crying. After she falls asleep, she gets tired and after about 20 minutes, she does it again. At first, everything was fine, she sucks well, milk comes in after about 10-15 minutes, then she pulls on the nipple and cries. I think her breast is empty. We don't have any strong colic problems. We poop several times and gas comes out. I don't know what to do anymore. I