A.L.
I understand that asking on an internet site feels like a good way to get an immediate answer from a variety of people who might have experienced something similar. In matters which involve your child's health and development, however, it's always better to talk to your child's medical person. They have more experience than any one of us and most importantly, the pediatrician or nurse knows YOU and your child, and can examine him. I'd suggest calling to ask at the office and making an appointment if they feel they want to see him, or maybe they'll want to wait until the 6th month appointment, which is in three weeks anyway. Good luck with it!