i could count the number of bad days i had with my 13-mo. old son on one hand until recently. the past few days he has become very fussy, whiny and clingy. he wants me to hold him constantly but not sit down or stand in one place for too long. if i sit down, he pushes away from me, as if he wants down; when i put him down, he reaches for me like he wants me to pick him back up. when i do, the cycle repeats.... i have tried to distract him with a book, toys, even riding in the car is not as effective as it used to be. when i am doing things around the house, he just crawls behind me, whining. i interact with him alot because i stay home most of the time. he has my undivided attention, at least, 4-5 hours every day. what is causing him to be so needy, all of the sudden?