Night Terrors 😱

Okay someone explain night terrors to me, and PLEASE let me know if this is what my 13 month old was going through last night. He often wakes up from bad dreams but I rock him back to sleep. Last night he woke up SCREAMING like he was terrified. I went in to rock him back to sleep but he just screamed and screamed and tried to get away from me. My husband came in and he was screaming pushing us away... we wanted to wake him from whatever was going on so we finally decided to bring him out into the living room. He calmed down we read a book, but as soon as I started walking back to his room he started screaming again and fighting his way out of my arms while I tried once again to rock him. So I put him back in his crib and he screamed for another 30 minutes. Finally he let me rock him to sleep. Once he was sleep he would try to sit up out of my arms but I could just lay him back down... it was so strange and I had no idea what to do.. this all last 2 HOURS. Is this a night terror or am I missing something? If this happens again at least knowing what It is will make it easier.

HELP