My DS is 7 months old. For the past two weeks, he will not sleep in his crib at night. He sleeps great during the day for naps in it, but he refuses at night. He will literally be past out in my arms, snoring away. the second his body touches the mattress, he starts screaming. And, he doesn't wake himself up to the point where he opens his eyes, b/c once I pick him up, he goes back to sleep in my arms. I know I could try the CIO method. Problem is, I have a 2 1/2 year old with a room very close to his. I'm nervous she'll wake up from the crying. Has anyone went through something similar? I don't know what the difference is between his naps and nighttime. Now, he sleeps in my bed b/c I give up.