I have not been diagnosed with PTSD, but my ex wife has been. She often told me that she cannot remember things when she has been put on the spot or when anxious or nervous. She would have "blonde moments" as she called them before we found out PTSD caused it. I feel bad beacause I kinda made fun of her(jokingly nothing serious) and she went with it. Since I discovered her condition, I haven't mentioned it since.