If I was at a concert and screamed for two hours straight extremely strained chords. Can't talk will I have permanent vocal damage?

Screaming. While it is not wise to scream for two hours, the body is very resilient. You will most likely recover completely. You need to rest your voice (no yelling, no whispering, no talking except brief exchanges, no singing). If hoarseness persists for more than 1 month, get checked by ent.
It's possible. Rest your voice and see a doctor if not better within 2 weeks.