So my 15 month old has been sleeping in his crib and room for a while now but now lately every time I go put him in it he wakes up crying seconds after I put him down. He falls asleep in my arms and that's when I would take him and lay him down with no problem until lately when this started happening. I'm not sure why or what changed. Do you or have any of you gone thru this? What should I do/what do you suggest I try? Hopefully this makes sense.