Baby won't stop breastfeeding! Help

Elise • Married to my highschool sweetheart❤️, 2.5 yo daughter 👧 and pregnant with my 🌈 rainbow baby 🤞
So my little Evelyn is not quite 3 days old and at night she wants to be attached pretty much constantly. My milk hasn't come in yet but she will feed for 30-45 minutes and then I will try to lay her down to sleep and she will instantly start crying and suckling again and she will then eat for another 20 minutes or so and this continues the entire night. She likes pacifiers but I can't and don't want to put her to bed with that in her mouth! Anyone else experience this and have any advice, is his even normal? I'm getting quite frustrated and extremely tired!