Twin pregnancy?

For those of you who have had twins or are having twins what were the signs?

Do twins run in your family?

I took a pregnancy test days before my missed period it came back positive within the minute. I knew i was pregnant i can just feel like. So im not surprised. Lately ihave been itching like nvr before seems to be only if not more at night time and i am extra tired. Twins run on my moms side of the family. I am a twin my self.