In my experience, having a baby and getting enough sleep are oxymorons. While your baby sleeps, you won't be able to. When you sleep at night, the baby is up asking for food. And then there are the moments when the baby won't sleep unless you're holding them, forcing you to stay awake for an untold number of hours. In fact, it can start to feel like your baby doesn’t want you to sleep. Eventually, though, your baby will sleep, and they'll try to tell you to get some sleep, too.
At first, you might not mind that they sleep best in your arms, but after a few days of them having to touch you to be able to sleep you will try anything to transfer them to their crib or bassinet without waking them up. When you succeed you will feel like a rock star, and that's when you should immediately head to bed yourself. But when they fall asleep on your chest, and before you're able to send them to bed in their own sleep space, the weight of their warm little body and sound of their slow breathing is enough to lull you to sleep. Clearly, they’re trying to say something.
If you ever actually get an opportunity to sleep as a new mom, you should definitely take it. Unfortunately, you might just be too tired to see signs that your baby thinks it's time for mama to get some rest, like the following: