Hi Alexa, thanks a lot for the advice. I'll try to put my LO for a catnap today. Sorry, what is APOP ( btw is there any board in this website about all the abreviation mostly used ? ) ? Ok, back to the NW, today is the 12th day of the NW. At the beginning, I thought it was a growth spurt / development milestones, but it last more than a week. Mostly he wake up somewhere at 8.30pm and 3am. Could he be overtired due to not taking a catnap ? I wonder if it is teething, but I couldnt see any white bumps on his gum. Mostly he would wake up crying / screaming, then I feed him and he back to sleep ( he has started solid for 12 days ).