Matt, hello.I can tell you that when I started showing signs of PTSD, I had NO memory of the trauma. I was having the same symptoms you described and I could not say why. I thought I was losing my mind.
I remembered somethings, but then the memory would fall off into nothingness or I would dissociate and not recall anything.
I remembered having a summer job, the year I turned 17. I remembered who I saw and what I did and then nothing...no memory of finishing the summer, etc. All of it gone.
Many years later I had a very violent and startling flashback ( my 1st one). I was at work that summer and was raped on the job. I never went back, never went to the street it happened on, I never even went back to get my check. I can now recall it, but not until the flashback. I was just a messed up, mixed up teen. I even let my mom slap me around and call me names, I could not open my mouth about it.
It is a really confusing disorder.
I hope that you are able to get the help you need to ease the symptoms adn help you feel better.
There are very specific criteria for the diagnosis.
Much support and safe hugs...