5 weeks sleeping through the night

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My baby is 5 weeks today and slept for 6 hours last night. I’m so surprised and happy to get more sleep.

Every night I do the same routine between 11-1. Swaddle, loud rain white noise, dark room, bottle, and cosleep.

Has anyone’s baby slept through the night once and then no more? I’m really hoping this was a developmental milestone that is here to stay until she has another growth spurt