How to stop night terrors?

my son is a preemie his water broke at 28w2d and he was born at 30w2d via c section. he spent 53 days in the nicu. adjusted hes 6 months but 8months from when he was born he has special needs and nite terrors how do i help him get past the nite terrors. his dr says dont wake him it will cause damage when hes older.