Help?

Got my 12 week scan on the 10th feb! Just curious on what people's views are. My boyfriend has been driving me nuts for the past 2 weeks (he recently moved in because of the pregnancy) and I'm just sat here thinking I don't even want him at the scan. I am only allowed to take one person in with me and I'd rather my nan there. He is super excited and I don't know how to go about it or if this is even normal :/