Contraception

Hi guys I know this is completely random and kinda to do with sex & Realitionships.
​I'm 16 years old and I have a boyfriend and Tommorow I'm going to the doctors to go on the pill to be safe.
​Can you all give me advice and like I don't even know just tell me what they ask cos I'm a bit nervous I think it's because I have no idea what's gonna happen ahahaha thanks for any comments I appreciate it!