Twins?

Penny
I'm 6 weeks pregnant, and was just curious who knew they were having twins before the dr told them? I just kinda have that feeling, and then on top of that, my lower abdomen feels jinormous, but at the same time I'm only 6 weeks! My last pregnancy o didn't even feel pregnant until like 10-12 weeks! So what are the chances?? And then I won't visit my dr until I'm ten weeks.