I don't have anything smart to add on the IQ piece (out of my depth) or know anything of your story, but I noticed your mention of trauma...are you considering a possible disorder of attachment?
I referred a very young (4) girl who I suspected was 2E for psych eval once and her IQ score was much different (lower) than I sensed in therapy. She ended up with a RAD dx (not severe) that the psych thought influenced the testing outcome. This child seemed brilliant to me, but unable to show it in testing.
