This happened to me last month (July), and I'm not pregnant. Has anything stressful happened to you in the last month? Even something like a move, which may not necessarily be stressful emotionally, is still stressful physically. My husband and I moved across country mid-cycle, and mine ended up being 12 days late (usually 33-34 days and this came on the 45th day). I went to the dr because I was late, but had several negative tests. The test at the dr was negative, too (which was devastating to me) but she wasn't worried about it saying that the move interrupted my cycle and not to worry about it unless I went without a period & had more negative tests through August. Sure enough, three days later my period came. So give it another week or so and then call your dr.View Thread