Twins ???

Stephanie
I have my first appointment next week  but idk if I can talk him into an ultrasound if not I'll have to wait til feb 8th ... But I was just wondering anybody with confirmed twins or had twin in the past what are some systoms ?... Mom mom keeps saying it runs in the family I'm 6 weeks and 3 days and I've gained 5 pounds in a week... With my last I didn't gain weight that fast or this soon haha 
What are some systoms you guys felt with twins before an ultrasound ? 
I'm just a little curious :)