What Causes Delayed Periods And White Discharge After Taking I Pill?

hey, i took an ipill on the 16 because if some sexual activity on the 15 where me bf just stimulated himself and thinking his pre cum must have entered i took the pill. i had vaginal bleeding for 5 days in the middle. its 7 days past my due date and my period hasnt come. thrice the home pregnancy test came negative. i am getting white discharge too. am i pregnant? whats wrong with me? when will i get my period?