I just want to say that to be curious is a good thing. I'm sure that you will encounter many different opinions of what constitutes PTSD. Some may be from experienced professionals and some from professional confessors. I will never undo and can never undo what has been the experiences in my life and for me that has been the most difficult event for me to recognize. PTSD is not a "play-toy" as might be inferred by others, as it is a very serious condition that many are inherent of and never know it.
A great cause for the PTSD that I experience is the witnessing of the murder of my mother when I was only 14 y/o. That has undoubtedly left an indelible impression in my memory that at any instant I can revisit. It was nasty, it was horrible and it was terrifying and life altering. Adding insult to injury the next day was the kicker, when the air patrol discovered my father in one of our pastures walking around with the shotgun used to end my mothers life. You can imagine the rest I'm sure...well I should say that I did watch him endure the court system and penalty phase for 14 years and then settled back into a life of his choosing, he finished what wasn't able to do 14 years earlier by taking his own life. While my father was incarcerated for his actions the issue of guardianship was accepted by my grandmother, who lived a short distance up the road from us, and my teen-life continued as normal and as uninterrupted as possible for the next 3 years when she had passed away during the night and I discovered her postured in bed looking out the window across the valley, lifeless and discolored. My older brother of a year and I remained living there in my grandmothers home and I managed completing High School and chores and graduated at 17. I spent a while on our homestead and decided to enlist in the Marine Corp in 1988 and departed in 1992. In that time period I really learned alot more about life. I was able to spend a year in Okinawa, Japan and a short time in South Korea as well as Camp Lejeune, NC and Saudi Arabia, Kuwait and Iraq where I experienced the thrill of the man-hunted and the hunted-man in defense of our National Securtiy. Now I am currently losing the use of both legs due to a condition named "Avascular Necrosis" which means that the blood source to my hips was somehow interrupted and the bones are dying, there is no reasonable explanation for this as the Veteran Hospital in Dallas explained.
My best advice to you is to seek professional help on the issues that you are dealing with and let them decide what the dx is. Sometimes it can be very difficult finding someone that feels comfortable to you in order to get the help with your issues, regardless, it is important in order to grow. We are the seed...just add water.
Hopes and Prayers for the comfort you seek.