Boy vs girl

Emma • England. Married. Age 26. Pregnant with baby number 1, EDD 24/05/2015 xx
How true are these old wives tales? Ie. Sickness with a girl? Heartburn with a baby with lots of hair? Dreaming of the sex you're having. Do you believe in this? Did you have the opposite to what you expected? I think I'm having a boy. Can you tell me any other old wives tales?