Pregnancy could be very possible, as the pull out method has a very high failure rate as even if he did not ejaculate, pre-ejaculate could have been present which contains enough sperm to cause pregnancy. Your best bet is to wait until your regular period is at least two weeks late, then see your doctor for a blood pregnancy test as this is more accurate than any home test. In the future I would recommend that you use some other method of birth control. Another possibility is that this was an abnormal period. In this case, this could be due to many things including stress, weight gain/loss, thyroid, hormonal imbalance, infection, illness, medications, polyps, cysts, just to name a few. If testing determines that you are not pregnant, your doctor will need to do additional testing to determine the exact cause.
