growth spurts??

Danielle
My son just turned 3 months old and out of nowhere he's screaming,won't nap and is eating 4 oz every 1.5 hrs. I know that he should be able to hold of longer with 4 oz but once it hits an 1.5 hrs from his last feeding he is screaming for more food then he's perfectly fine until it's time to eat again. Is that okay for a growth spurt?