My symptoms started with heartburn almost a week before my period was due. I took a test a couple days later, and it was positive. Because it was positive so early, I thought my previous period must have been implantation spotting, and that I was about 8 weeks along at the time (due 9/21). I just found out through an ultrasound this week I am NOW about 8 weeks along (due 10/17). My heartburn was followed, a couple weeks later, by nausea and extreme fatigue. Increased sensitivity to smell, increase in my bra size. But this week (with the exception of the bra size!) my symptoms are gone. This wasn't too disturbing when I thought I was 12 weeks along, but now that I'm told I'm 8, I'm pretty worried about it. I'm energetic and not at all nauseous. I did see the heartbeat, which was fine, on the U/S tuesday, but I know that's no guarantee. Am I right to be concerned? Has anyone else had this happen?