Help! My 10 month old son is waking up every 2 hours starting at about midnight. He falls asleep on his own when it is bedtime and will sleep fine from 7:30 to about midnight and then is up every couple of hours. Usually, I can give him his pacifier and blanket and he will fall back to sleep but sometimes it is a 45 minute fight to go back to sleep. We've tried a sound machine, fan, pillow in his crib, etc. and nothing is seeming to keep him asleep. Any tips are greatly appreciated.