What Are The Chances Of Pregnancy After Taking Ipills?

hi, Im on Loette birth controls and have been for allmoust 4 mouths, ive been a good girl and always taken my pills on time. usually around 10pm every night. But one night i i forgot. and unfortuanlly it was a night I did have sex and he came inside me. i took the pill emigantly when i rememberd. around 4am. am I still safe not to be pregnet or what should I do?