We had his 4 month check up this week. He is technically 4 1/2 months, but we delayed his 4 month check up due to a sinus infection (well, something similar to a sinus infection) that we discovered at 4 months that we needed a couple weeks to clear up :) ).
Sam is doing good - small - but good. He is 12 lbs 9 oz (10th percentile), 24 1/2 inches long (25th percentile (I think - I don't have the sheet with me right now :/)), and I don't remember the circumference, just that it is in the 30th percentile.
He has had congestion / cough for over a month now (hence the infection noted above). I have thought all along that it was a cold, but the doctor mentioned it might be a dairy allergy that is causing the extra mucus (who knew?!?). That being said - I am going dairy free for the next couple of weeks to see if it will help (no milk, cheese, butter, ice cream, etc. - fresh or cooked into things). Hopefully this either helps or he gets over whatever it is soon - because waking up to a coughing baby every day breaks your heart. Thankfully - his happy mood hasn't been affected too much by the coughing / congestion (only when you go to suction out his nose - but who, in their right mind, would like that?)
And - giving up anything is easy when it is for a cause THIS cute:

