ammonia level high

my family • Mommy of 3 💙💜💜 Engaged to a king😍😊
my baby was born full term and is now 2 1/2 months. the dr called me and told me that I need to take my baby to a specialist because his ammonia level is high and is only common on premature babies. should I be worried? what does this mean? I'm just praying to God it's nothing serious.