Went to the doctor today for an ultrasound, and they think it might be twins, but don't know for sure since I am only 8 weeks, and if they are twins then they were lying on top of each other. They heard what sounded like two different heartbeats, and it looked like there were two spines. I'm going back on Oct. 22nd to find out for sure. Kinda terrified. This is my first pregnancy and any information on what you think is happening would be great! Twins run in both my family and the father's family, so I just don't know what to think. Has anyone gone through this? I just wish I could know for sure.