Still Sleeping at 2am

Unfortunately Josh is still sleeping extra extra late - tonight at 2:45am.  I can't believe it's already been 3 weeks of this.  Josh seems so tired at night but just won't fall asleep.  Or rather, he can fall asleep but keeps on waking every 45 minutes or so.  Please, please, wish this phase goes by quickly.  (it's so hard to get angry at this sweet face...)