alright so here is my situation. last month when my period started i started taking birth control pills but i only took a little over a weeks worth because it made my period last for 14 days. so i stopped taking it. well this month i should have started about 6 days ago but i haven't. so i am about 6 days late.i have had unsafe sex with my fiance so there is a possibility i could be pregnant but i took a pregnancy test about 2 days after my period should have started and it said not pregnant. could the birth control and 2 week long period have affected this month? or should i take another test? thanks.