It most certainly is not to young to have night terrors. My daughter started having them around 2 months old. I thought it was just gas or some sort of pain, until she did it in the doctors office.
Of course, the doctor said, we will never know FOR SURE if thats what it is, because she cant tell us.
She still does it sometimes, and its extremely scary. She wakes up screaming, flailing her arms and legs, whipping her head from side to side, eyes closed, tears just rolling down her poor little face, shaking...
I always end up crying and shaking too >.<