Has anyone had something similar happen? so my last period was August 19 ....i have no idea when I ovulated in September...i was supposed to get AF September 21st ...i didn't get Bfp till September 23rd....i went to obgyn Oct 2nd.. and they saw a gestational sac but nothing inside and told me to come back in 2 weeks ...i just went back yesterday Oct 16th and saw fetal pole and heart beat but couldn't really give me a measurement and told me to give it another 2 weeks.....they said I'm measuring 5 weeks and 6 days ...but how is that possible if my last period was in august??! someone please help!! I'm scared that there's something wrong and baby isnt developing at the right pace.