Hello dear I understand your concern You are on levlen, and it is highly effective in preventing pregnancy. You have taken pill every day but not on specific time. But it does not affect efficacy of it to prevent pregnancy. Irregular use increase side effects. Chance of pregnancy is extremely rare. Take remaining pill regularly on specific time by putting reminder in mobile. If your period will delay by chance more than 7 days then undergo urine pregnancy test and or blood HCG test to confirm pregnancy. Avoid stress, take healthy diet, drink plenty of water and do regular exercise Hope this may help you Contact further if follow up needed Best regards Dr. Sagar