After you found out you were pregnant, did any over your friends just invite themselves to your appointments???

I’m 19 years old, 8 weeks 3 days & my babies dad wants nothing to do w it so my best friend (w kind intentions) just invited herself to my first appointment, while I love that she wants to be there for me I want to go alone, I have been so terrified that something will be wrong or they won’t find a heartbeat and if that happens I don’t want someone hanging over me trying to comfort me from something they can’t fix, I’ve always been the kind of person that when I’m upset I want to be alone, I explained this to her and she feels like she should be there which is annoying me, I think I’m just going to move up my appointment day and not mention it