I had unprotected on 9/27 and on 10/2 I started my period. My period usually lasts at about 5 days with 2-3 days heavy and then very light for the last 2-3 days. Not only was my period a little less than two weeks early, but I'm now on day 6 and am still really heavy, which has never happened before. I also have been feeling nauseous whenever I eat anything, and have been feeling very tired, can I be pregnant?