Hi. My last period started 24.01.2010. On 22.02.2010 my HCG read 50. On 27.02.2010 my HCG read 200 but nothing could be seen on a transvaginal ultrasound. On 09.03.2010 my HCG read 2,000 and a sac and fetal pole together with fluttering fetal heartbeat (!) could be seen on a transvaginal ultrasound. I was pretty sure on that day I was 6 weeks and 1 day, however, the doctor said the size of the sac and the rate of the heartbeat was more like that of aprrox. 5 weeks. I am scheduled for another scan in 2 weeks but am, of course, worried waiting. I haven't had an massive pregnancy symptoms except for being very tired and mild breast tenderness and feeling of nausea. Has this happened to anyone else? Many thanks.