I m 22, on Levest 28 day contraceptive pill, i have taken my pill on time every day, my last period was less than 2 days long and I barely bled, now I ve just finished my next break week and I ve had no period so by my count I am 7 days late, I only have unprotected sex if I have more than a week of pills left before the end of my pack and most times my boyfriend finishes inside me, I took a pregnancy test this afternoon and it started off saying positive then the positive line faded and the result was negative, is there a chance I am actually pregnant?