OK, first things first.
As you are finding out, no two pregnancies are the same. The idea that your hair and skin are affected by the sex of your baby is an old wives' tale, so pay no attention. You may well be carrying a girl, but your hair and skin are not a barrmoeter of gender in your baby.
Hormone imbalances which affect different mums in different ways give rise to all sorts of bodily changes, which settle down once the hormones come back to earth. However, if this excess hair bothers you, I can;t see any reason why a salon won't wax it for you. It will make you feel better, and it's obviously no harm to baby, so go and book yourself in. have a manicure and pedicure while you are there - you deserve it!