I am a sexually active college student. I have been on a 21-day birth control pill for about two years. I always take the pill within 22-26 hours of my last pill. I accidentally missed one pill about a month and a half ago, but since then I haven't missed any. My current partner and I use condoms. However, about two weeks ago, we had sex and did not use a condom. We were very nervous and therefore decided that he should not ejaculate inside me and that we should not use the pull-out method. We simply stopped having sex after a little while and did other things instead. I usually get my period two or three days after I start taking the placebo pills. So, it should have come around Christmas day. I have never missed my period, though it has come late before. This time, it completely has not come (yet). I took an at-home pregnancy test and it came out negative, but the fact that these can be innaccurate scares me. Usually if my period is late, I will still have cramping, and maybe a very light period for a day or two. This time I have no signs like that at all. I have been exercising a little more than usual but nothing extreme. Do you think pregnancy is a possibility?