Well sweety, did you happen to have sex on those 2 days or alot during that one week? If so then ofcourse it is possible. But don’t worry, that happend to me last year. I forgot to take it a couple of times and i was FREAKING OUT. Every little symptom I got (nausea, craving, menstrual-like cramps) I got so sick and thought I was pregnant again. I just bought 3 tests to make sure and thank God I wasn’t. So don’t get yourself all worked up if you haven’t even taken one yet. It could just be your subconscience.