Very worried

Hi all,

So at my son's 6 month appointment my doctor was concerned he was not babbling with consonants. He was seen and cleared by early intervention. He was evaulated by audiology. Hearing is fine. I'm starting to really panic. My other concern is he only responds to name 1/2 the time. Has anyone gone through this and everything ended up okay? I'm just so worried. He will imitate if we stick our tongues out and blow raspberries with us... but that's about all.

Edit: He is 8 months now