Gender Dissapointment

It's my 3rd pregnancy... i already had 2 beautiful girl and hoping for a boy and I do sound selfish, as many couples out there just hoping to have a baby... I just came back from ultrasound and the doc say it's a girl and I cannot help myself but just cried at home when no one is around... I wanted a boy badly since 1st pregnancy because I don't want my girls to go through the life of being a girl/women... I can't help myself but being very sad and dissapointed... what should I do... google tips doesn't help either... i keep thinking why I need to let my girls suffer of being a girl/women...