This seems impossible to me, but the internet seems to think that it happens, lol. This is my first pregnancy, I'm only 10 weeks, and I have a legitimate bump. I'm in maternity pants now because my regular pants hurt. It feels so soon to be showing and everyone keeps asking me if there's only one in there. Twins do run in my family, but they would've seen at my 8 week ultrasound, right? I don't see any signs of more babies in there--my scan seems crystal clear!