A note on the topic of trauma that I personally found helpful in accepting the idea that I am a trauma victim is that one of the most widely accepted facts in the field of trauma research is that abuse is often not the common factor in whether somebody will develop ptsd.
Many people can go through awful things without developing trauma based disorders as long as they receive compassion and support in processing those events as they happen. The most common factor in developing something like ptsd is emotional neglect. And emotional neglect on it’s own can be enough.
Whatever you went through was enough I promise, you’re not overreacting. Abuse and neglect are traumatic at any level, you don’t need to have gone through the worst possible experience you can think of to develop ptsd. If it hurt you then it hurt you.