Terrified

I go for my first exam/scan this week and I'm terrified to not hear a heart beat of course, its my main fear, but I'm also terrified that there may be more than one. I know that sounds crazy but that's double the work so I'm allowed to be scared since this is also my first. My nurse said there's a good chance. Both sides of my family has twins ands triplets and my husband's grandma is a twin so it's also in his side. Of course I'd love my babies but I know that'd be overwhelming. I'm so nervous for the while appointment and just wanted to get it out of my head.