Due mid december and possibly twins??

Ok at my first doc appt I was 11 weeks and my doc told me that i was measuring way big for how far along i was. She said that i may be carrying twins but could only find one heartbeat which isnt too uncommon. So I have another appt on july 3rd and ill be 16+ weeks and if im still measuring bigger then ill get an ultrasound.

Has anyone else due around the same time been told they are having twins? And how far along were you when you found out. Thanks!