how do I tell my mam I'm on the pill

Heyya, I recently went to the doctor to go on the pill which I am on now as I have been reckless contraception wise. My mom still thinks I'm a virgin. I'm 19. I'm afraid that she's going to find the pill in my room and feel like I should tell her before she finds it.
Does any body have any suggestions/advice?
No hate please!