I have been diagnosed and treated for PTSD. The part that was amazing for me on this journey is that
I did not have an actual big trauma that I could fall back on as my issue....but repeated small traumas can add up over time.
When we are in trauma we have the memory but not a "time stamp" to go with the memory that means we relive it over and over when there is any trigger.
I also was resistant for a long time but feel safer in the world as I have gotten support. EFT, and a therapy called Hakomi has worked for me. I think EMDR is great but have not actually experienced it.
I found this link helpful.
Psychological / Emotional Trauma: an overview