what happened ?

Marlene • Ruby Layla Lugo 💖👶🏻
Ok so my baby will be 3 months in 2 days and sleeping through the night was great for me at around 1 month and a half she started sleeping until 5:30-6 . Then 2 months she would wake up at 7-9 in between those times out of no where for the past 4 days she has been waking up at 3 or 4:30 Why ?? Will it go back to how it was before ?