Sleep help!

SM

So my baby has been an amazing sleeper since birth. Slept through the night starting the day she was born. We have been so lucky.

Now she’s 7 months and for about a month now every couple nights she wakes up and is unable to put herself back to sleep. It’s 4am and since 3:20am she’s been rolling back and forth trying to fall back asleep but unable to.

How do I get my baby to sleep through the night again?!