FTM Breastfeeding Baby Won't Sleep. 😭

Hi, FTM to a 7 day old baby girl. We are breast feeding and that is going really well. But for 2 days now she will not sleep unless I'm holding her from 12am to 3 am. She also does like this weird cluster feeding during that time. She has fed 4 times since 12:30 am (it is currently 2:37 am) and each time was for 12 to 18 mins each. I am not co-sleeping and have no intentions to do so. I do try to burp her in between breasts and at the end of feedings. She just will not go down. This is the only time that she does this. Please help a tired mum out!!