I have CPTSD from growing up with undiagnosed autism, ADD, and an abusive father. I would recommend anyone who is on the autism spectrum or has ADHD look up CPTSD. Reading about it was extremely helpful for me and the distinctions between PTSD and CPTSD are large enough so that a person might not realize they have trauma just from reading about PTSD alone.

People with CPTSD have emotional flashbacks, which are different and much sneakier than what people with more specific trauma deal with. There are no indications that you're experiencing a flashback, and they can alter your personality, make you miserable, and destroy your relationships.