ok so I'm 16 i just reciently started taking birth control pills, I'm at the end of my first month on them, and my period is late, i took the second green pill last night and I was told by my doctor if i didnt start my period by the second green pill i was prob. pregnant. . .could that be possible? I started taking the pills the sunday right after my period like my period stopped on the saturday right before the sunday i started. Does anyone know if its normal to be a little late especially if its your first time ever being on birth control? usually i dont have my period until the second week of the month, and right now its only the first could that be why its late even tho Im on the pills?