possibly twins or no?

So I'm 11 weeks and I think I could be having twins . I know you can't tell for sure unless it's a ultrasound but if anyone has any comments feel free please. I was a small size prior to being pregnant but I've gained 16lbs already , and went from a size 34B to a 36 C . This isn't my first pregnancy and I do have twins in my family including my mom being a twin. Id just like a few other opinions ! thanks in advance ladies 😊