hello, i missed three birth control pills in week 2 of my pack and i am nine days late for my period. I also had sex quite a few times within the time of missing pills and even recently. my breasts are not sore but my nipples and areolas seems to be bigger, i have frequent headaches and bloating. i have taken four pregnancy tests but all have come back negative. is it possible that i am pregnant or did i miss my period because i missed 3 pills?