Carter's 2 yr. Checkup

I took Carter to the doctor today for his 2 year old checkup. Luckily he was up to date with his shots and didn't get poked! The doctor was concerned with why he doesn't say many words and doesn't say two together at all. He did a hearing test on him and his left ear's hearing wasn't good. He's a had a cold for a couple of weeks so he thinks that might be why, but he wants me to come back in a month to get him checked. So hopefully it's just plugged from his cold! Brylee is really sick as well she's had a sinus infection since Sept. and now has a double ear infection that's being slow about healing. The doctors have run some blood work and we're hoping to get some answers on why she is staying sick. If those come back fine, then we'll need to check out her sinus cavities by an ENT. I tell ya, this has just been one heck of a year for us!!! Here are his stats:
Weight~ 29 lbs., 55%
Height ~ 27 inches, 95%