Doctors appointment

So my mom has gotten me an appointment with my doctor to get birth control for me, mostly for cramps but I am also sexually active. I haven't told her that I am since me and her don't have a great relationship. She's told me that she's not leaving the room no matter how much I want her to but I don't want her to find out I've had sex already because she'll probably shame me out it, but I also don't want to lie to the doctor. What do I do? TIA šŸ’—

Ps. I'm 16