Can someone have PTSD from being fired from a job? I was fired 17 years ago from the job I always...
The things that trigger PTSD vary widely from person to person. I certainly think it is possible that what you suffered was traumatic, and perhaps resulted in PTSD. My own PTSD went undiagnosed until I suggested to my therapist that I thought I might have it. Therapists do the best they can with diagnosis but they don't always get it right 100% of the time. You may want to mention why you think you have PTSD and discuss it with your T.
Regardless of the diagnosis, it certainly seems like you were traumatized. You would possibly benefit from some of the same treatments that are used for PTSD, such as EMDR.
Lastly, I'm sorry you have to deal with this. It is frustrating when you feel like you have a more severe condition than the professionals initially think you have. You did a good job articulating your symptoms here. If you are sharing the same info with your T and it doesn't feel like you are being taken seriously, you may want to experiment with seeing another T.