My 14 month old is all of a sudden not sleeping good! The last two nights she's been waking crying like every 45 minutes. She rolls around in her crib, or even sits or stands, but can go back to sleep after like 3 minutes. No poops or anything. Maybe some gas? I gave her motrin in case she's teething. Naps today were cut short by crying, too. This is not her norm. What could this be???