Hello. I am a 16 year old girl, and I just recently started taking the lo loestrin fe birth control pill, but not for sex. I started taking it because I have had athletic induced secondary ammenhorea (loss of my period) due to when I started running and eating healthy. I currently run cross country and track, working out hard almost every day of the week. I am taking this birth control in hope of regulating my period back again. I am very weight-conscious, so I am worried that on the pill, I am going to gain weight. This is one of my biggest fears, because I used to be a bit heavier and never want to go back to that. I am just SO nervous that I am going to gain weight and my running will be negatively impacted on the lo loestrin fe. Does anyone know if lo loestrin fe causes any weight gain or does anyone have any positive/negative experience with it? Thanks