I still get upset seeing it portrayed on TV, I'd say its kinda like sharing in the fear the actor is portraying. Reading about PTSD used to make me uncomfortable, but I did it anyway because i wanted to understand why. If you're injury is still raw, you will feel anxious, or upset. I don't know what it is exactly, I just know that for me, it was almost a fear of accepting that I was relating to the things I was reading; a fear of being "one of them", having some label pasted on my head. I used to clench my jaw, tap my foot repeatedly or just get shakey in my stomach when i'd read about PTSD, I knew I could only read bits at a time. A book I have actually suggests this. "If reading the content makes you feel too overwhelmed, take a break, put it away, focus on grounding, safety and relaxation, then come back to it when you feel strong again." I guess its kind of like exposure therapy.
Don't push it too hard, you'll heal at the rate you are supposed to heal at, no one can tell you that you'll be healed in X amount of time, only you can know how you feel. Trust that it does eventually get better to deal with.