My boyfriend and I don't use condoms everytime we have sex but he has never came in me. I take the birth control pill every night around 7 o'clock but one night a few weeks back I forgot to take it so I took it the next day around lunch time when I remembered. My period is now a week late and I'm starting to worry. I'm not sure if I'm just missing a period, my cycle is changing or if I'm pregnant.