My kids are driving me f*cking crazy with our newborn

Is this normal??? I legit cannot stand to even be around my older kids. They’re getting so bratty, all of a sudden they’re super high energy to the point where I can’t get a sentence in because they’re always talking over me, they legit tell me “I’m doing this and if you say no I’m still gonna do it.” They push and shove each other and shriek and yell. They’re 3 and this is all out of nowhere. They were never like this before. They love my newborn and are so excited she’s here, but they’ve had such shit behavior I am starting to resent them. Like I’m ashamed to admit it... I know this is terrible, but I am having trouble even finding them cute anymore at this point. I don’t have control over it I’m just so fed up