me and my boyfriend have had sex 3 times before and things were fine. i have irregular periods and i had 2 last month but i havemt have one this month. so me and my boyfriend had sex and the condom was loose, but he didnt notice it til he pulled out the last time.. i'm 16 and i cant be pregnant. my older sister is 19 and she just got pregnant (unexpectedly) and i dont want to disappoint my parents again cause ive heard the story plenty of times. i dont know what to do... please, please, please help me!! oh yeah, i had sex yesterday night. its only been a day.