Izzy has started to suck her thumb since week10. The strange thing is that she does not suck it when I hold her but when she is put down somewhere she sucks let alone her thumb, her fist. I am a bit distressed by it as she is my first child and I don't want her to do it if this is as others say, because she is stressed and tries to calm her down. I wonder what is going through my little one's mind when she feels like sucking it... -.-