I really, seriously need some advice on how to take care of my four week old daughter's non stop…

I really, seriously need some advice on how to take care of my four week old daughter's non stop screaming, crying, not sleeping for about four hours straight for almost a week straight so far. She will completely fine all day long, but right when it hits night time. When we finally get our one year old down for his bedtime, and my husband and I want to have our personal time. She starts screaming non stop. It doesn't matter what we do. We will feed her, burp her, lay her on her back with a pacifier, swaddle her, put her in a swing, put her in a bouncy chair, rock her outside, put her in the car seat, burp her, give her gas drops, give her some apple juice (just in case she is constipated), lay her on her boppy pillow. Nothing is working at all. I don't know what to do. Someone please tell me something to get her to go to sleep, or stop crying. I am seriously getting fustrated right now, to the point I'm crying 👎