J.H.
My son failed 2 hearing tests miserably. We then went to an ENT and they decided to put in tubes--which didn't help him at all. But, we did find out through an ABR (auditory brainstem response test) that his hearing is perfect. He doesn't act like it, but we now know he really CAN hear, and we are probably dealing with a developmental issue, not a hearing issue. I suggest making an appointment with an ENT and go from there.
My son is 1 1/2 and I've already learned that as a parent, I can never be too concerned about him. I almost always go for a second opinion!