Congratulations!  I am no doctor, but I know that premature babies can have elevated 17OHP levels.  So you’ll just have to wait and see and please let us know.  If your child does have CAH, it is quite managable.  We have 3 children, 14, 12, 10 and the 2 oldest have salt wasting CAH.  They are managed well and have an incredible life.  Enjoy your baby!