Anatomy ultrasound!

So I have my ultrasound on Monday, and at first I wanted someone to come with me and find out the gender with me, but the closer it gets the more I want to go alone, the two times I had someone in the room with me, I got dizzy, and almost passed out, and had a panic attack, I always feel like something is going to be wrong with the baby, and I feel like if I'm alone I can handle it better, the problem is I think my two best friends want to go with to find out the gender, and I don't want to tell them no and hurt there feelings, am I bad for feeling this way?