Wtfffff

I want to go into the doctor appointment myself. I’m 20 years old!!! My mom drove me because we share a car. When I told her I didn’t want her back there she got FURIOUS saying that I was going to lie or was going to forgot something. The only reason I don’t want her back there is because I like to be honest with the doctors about me being sexually active. Isn’t this a bit psycho of her. I’m 20 years old for Christ sake. Should I just tell her I’m sexually active so she can go back in the room and hold my fucking hand like she wants to🙄🙄