If no medical tests can explain my memory loss, anxiety, headaches, moodswings could it be did?

Unlikely: You seem to have elements of bipolar and anxiety disorders.

See www.ISSD.org: Presuming your physical work-up has been complete, you need a specialist consult to determine if you have dissociative identity disorder. A dissociative disorder not otherwise specified is statistically more common. You should find a trauma therapist or psychiatrist with at least 5-10 years of experience working with dissociation to have adequate expertise in taking the history, using diagnostic tools, and a full knowledge of dissociative dynamics. Please see www. Iss d. O rg.