I had a regular appointment today. I am currently at 18 weeks but the dr said I was measuring at 22 weeks. I asked if that meant I was further along than they think, which I don't think because the dates wouldn't add up. He said it probably means that my baby is bigger than normal for 18 weeks. OK- Now people are freaking me out and have me thinking that I could be having twins. I had a trans-vaginal ultra sound at 10 weeks and they only saw one and only heard one heartbeat. Had a regular appointment at 14 weeks and only one heartbeat. One one heartbeat was heard today as well. Don't you think they would be able to hear more than one heartbeat at this point if it was twins?