My last period started 1/9/08. After missing my February period, I took a home pregnancy test on 2/9/08. It was positive. I had blood work on 2/20/08 and visited the doctor on 2/27/08. At this visit she said levels were good.She did a transvagil us and could not see much. She said dates must be wrong and I was to come back next week. On my next visit 3/5/08, the sac measured 6wks 0 days, one fetus was found and a fetal pole measuring 3.3mm. but no heartbeat.Then something else was also in the same sac. My dotor has said i might be pg with twins and I'm having another ultra soun on3/12/08. Does all this sound like i'm going to have twins.