I forgot how tough it is to do CIO. LO2 was an amazing sleeper from weeks 1-3. He just turned 19 weeks, but for the past few weeks he has been waking up 3-4 times a night. Which wasn't as much of a problem up until recently. The problem is that I was recently offered a job that starts in the next few weeks and will need to get some sleep to be able to stay afloat my new position. How long did I take you train your child to sleep?