Hi i have been on the pill now for about 4 years. My boyfriend and I have been having sex without a condom and he doesnt pull out. I started to bleed on monday ( 5 days ago) and still havent stopped. The bleeding started out brownish then turned to dark red resently. Im nervous because i dont know what is going on. My period isnt due for another week. Could i be pregnant even on the pill? Is this implantion side efforts or miscarriage??