Noah just woke up screaming at the top of his lungs. I ran in there, picked him up, held him close, and whispered "Mama's here, it's okay." over and over. It took some time, but when he finally stopped crying (and sobbing pitifully), I settled him down and nursed him back to sleep. The whole episode took less than ten minutes. He's sleeping peacefully now - I'm still shaking in my boots.