My twins are 6 months old, for the past 2 or so months they have been brilliant sleepers, going from 7pm until 6am, for the past few week it has all gone pear shaped! They are waking in the night for bottles, waking each other crying, and last night was just unbearable they woke every hour and same as the past few mornings were fully awake at 4am! I don't know what is going on, I need hope that this isn't it forever now 