You can find the diagnostic criteria of PTSD here:
Symptoms & Diagnosis of PTSD | Psych Central
Basically, if you don't fit them (you have to have one from every category I believe) you don't have PTSD.
There's a big BUT though.
You can be traumatized without having PTSD. That's basically when you have some PTSD symptoms, but not enough to qualify for the diagnosis.
It's every bit as real as PTSD. And it doesn't make what you went through any less wrong.