Basically i had unprotected sex in october then had my period as normal in october but in decemeber my period was a week late, but it finally came, i started taking the pill which you take for 3 weeks then have a 1 week break at the start on january but on monday & tuesday forgot to take it, now it should be the week my period comes but their is no sign of it but recently i have been getting a sore pain in my left breast could i be pregnant, i have also not taken a test as i dont want my parents to know.