The only thing I can say is I would definantly go get a second opinon from another doc or more, that is what I have been having to do with my ds about so other problems. My doc didn't want to see my son again until he was a year or things got worse.
For me, this ws my son we were talking about and if he was in any pain or discomfort at all, i wanted it fixed and will not just wait it out. Again to me, if I feel it is not normal, then its not.
I hope you get the answers you need and if seeing other docs doesn't help well then at least you will have peace of mind that it is just something he has to grow out of.
Hope everything will work out for you and big hugs for you