Girls, can you please help me? The baby is 3 weeks old, during the day…

Girls, can you please help me? The baby is 3 weeks old, during the day everything's fine, he sleeps, eats, we go for walks, the baby is calm. At night it's like a riot, we don't sleep from 2 to 8 in the morning, he cries as if I'm killing him. He falls asleep on my arms only when I put him down, he wakes up and cries. Can you tell me, am I alone with this? Every night I think something is wrong ??‍♀️ already came up with thousands of reasons and diseases about myself Maybe the question is stupid, but the baby is first.