Did your babies show up with spears in their cribs and did you hear voices telling you things?
And the phone calls came in from family and friends almost daily. I realize now they were "checking up" on me, because I was so down in spirits. Friends in the neighborhood also lent a hand, without ever coming out and saying they were lending a hand. When the spell finally broke, people again noticed a distinct change and slowly eased back, letting me take charge of my life once more.
In my opinion, there must have been signs somewhere along the line. Unless you are confronted with some kind of severely traumatic event, the vast majority of people don't move into madness in one giant step.