At least you had the sense to realize it was wrong!  With our first son, I was inexperienced as was my husband and we didn’t think it was strange for our son to have a larger anatomy and some "peach fuzz".  Well, he turned out to have a milder case of CAH..not a salt waster.  Your son will not be a salt waster....wouldn’t survive much past birth from what our doctors have said.  But, it he does come out positive with CAH you are way ahead of the game.  With meds he will grow to his full heighth potential.  We didn’t catch our son’s until he was five..just figured he would be tall like us.  Even his pediatrician didn’t catch it!  He is now 10, entering puberty, and has a height potential of 5’9’’ though he could have been over 6’2’’.  Good for you to trust your gut instinct!