I am 16 years old and I have been sexually active with my boyfriend. I know I might get comments saying I'm too young but I need help, I am tired of having pregnancy scares. The only type of birth control method we use is a condom and once and a while the withdrawal method. I am thinking about getting on the pill, but I heard it doesn't work as well on women that are overweight is it true? I am 160 pounds.