Usually she's fine when I put her down for nap. A few times she's been okay with lying down awake and she'll entertain herself but she'll only do it for about ten minutes and then she cries. Today she's been mostly crying when I put her down. I'm pretty sure she doesn't have an ear infection because she's perfectly fine laying on the floor when someone's playing with her

Does she cry when you try to lay her down? If not try laying her down with her eyes open. She's to learn to self soothe or no one will ever get sleep.