Overdeveloped Motherly Instinct

I want a baby so badly. I've only been married for two years and my husband wants to wait until he's 27. I have even decorated our spare bedroom with toys and stuff for a little girl and I won't let anyone go in. Every time my period is late, I hope it's because I'm pregnant. Sometimes...I find myself fantasizing about someone leaving a child on my doorstep - or kidnapping someone else's child and raising it as my own.