Baby sleep. Is this normal or even okay?

Emily 🌈 • Australian, married since 2016, 2 miscarriages then my rainbow Sevana Iris was born 27th Feb 2018 💜 Tamara Aster born Sept 9th, 2019 💜

This is my second child so I feel like I should know 😂 I'm EBF and did with my first too. However, my first child was up every hour or 2 for a long time, if I was lucky I'd get her to sleep 4 hours. My second baby is almost 7 weeks old and has always been a great sleeper (will sleep 4-6 hours for the first stretch of sleep at night), which I've been so thankful for.

Last night though, she slept 9 freaking hours straight! I woke SO engorged, my blanket was soaked. Is that even normal for an infant to sleep that long? She woke up pretty happily, not screaming of hunger or anything.