Chromosomal Disorder?

Hi :)

I guess this is a weird question coming from a 15 year old, but is it possible to have a chromosomal disorder but still be completely normal?

Like I'm in the IB Program (the one harder than gifted) and I have a 93% average, I play competitive soccer, I run everyday/go to the gym, and (not to be cocky) but guys like me.. so that means I *look* normal?  Yet.. I have a (mild) webbed neck (you have to look closely but my hair is always down), low hairline (no one notices?) and I have epicanthal folds (but I'm asian.. so it looks normal as well).  

So basically, I have some physical symptoms but I'm smart and I'm normal.. is that possible? Should I get it checked out?

Thanks, Jessie :)

[mammo]

Sounds to me like you've got it all together in every way, so why even worry about this?  Enjoy all that you have, and continue to live your life to the fullest!