I have. I don't call it ptsd though. It's just when mommy doesn't feel well and feels scared. My oldest daughter is almost four and while I was going through the worst part, she was two. I really think that she taught herself to react the same way that I do in certain situations. Or, the things she fears most, she'll react instantly like her life is in danger. It's really not normal for a four year old to act that way. It especially became apparent when during the fireworks. The loud, unexpected noise frightens her too the point that she practically faints. I see my reactions in her. She gets pale, she shakes, her eyes get wild, her pulse skyrockets...etc. So I'm trying to make sure she feels as secure as she can. I'm hoping as time goes by, it wanes.