Question???

Elizabeth
I'm 17 weeks with my first child and still not showing everyone is telling me that I'm carrying in the back does this mean I'm having a boy or girl compared to old wives tales? Also at about 11 weeks I did the baking soda pee test and it said girl but at 16 weeks 6 days it told me I was having a boy does anyone know why this would happen or has it happened to you???