Ok, you're not traumatized, but have you considered that there's something wrong with you regardless?
In response to the doubt that one is truly conscious: the average person, if yanked off the street & interrogated, will profess to be conscious. This claim likely does not require justification (and furthermore, I am not a rationalist & do only subscribe to demands of support when I want to. Assume everything written below this is a product of gnosis). As an individual diverges from the population in most directions, there is likely something wrong with them. There are exceptions, regarding the state of the physical laws governing the world, etc., but if we are to only consider claims regarding the mind, most people are the same.
Ascribing trauma as the cause of any incorrect self-belief is not an incorrect choice—many people's disordered thinking originates from a singular historical cause. However, sometimes people are missing fundamental human experiences through no fault of anyone. To cite trauma as a likely source ignores this possibility & allows one to say, "I'm not traumatized!" Sure, but you're wrong regardless.
Most people have a sense of self. If anything, a lack of this sense is actually a lack of a meta-sense that one is experiencing this phenomenon. Seeing oneself in the mirror & recognizing that image is evidence that one has this experience. Equally, so is a sense of self-preservation. Centrally, the ability to interrogate one's inner world seems to require some agent by which to search for the self—this agent is itself one part of selfhood! If one lacks this, their claims about the mind do significantly diverge from the norm, and moreover, must be considered.