My DD just turned 12 month old and recently started waking up at 4an and refuses to go back to sleep. Doesn't cry, just up and awake which then turns into crying because I think she gets bored in the crib but it's way too early to get up yet. Is this another regression? What can I do to help her fall back to sleep as she doesn't need night feeds anymore and if we pick her up, she just wants to be up to play. Any suggestions on how we can tackle this?