Wonder weeks app

mrssquatch

Is the wonder weeks app worth it? I see so many people talking about the 4th leap while my husband and I are over here wondering what TF is going on with our baby randomly deciding he doesn't want to sleep through the night anymore, he's been sleeping through the night since 10 weeks and now all of a sudden isn't. Is it the 4th leap you speak of?! And does it last 2 weeks because we haven't slept past 3am in almost 2 weeks 🙃