161 is not unusual, though not usual either. are you
significantly shorter than your parents? are you the shortest of
your siblings? what about your relatives? it could just be a
hereditary thing, some families do not tend towards height like
others.
don't want to alarm you but it could be a bit late, i had some
growth hormone therapy thing starting at nine, but then again my
parents are crazy-worried people...
is it just the height that's bothering you?