U.K- new birth control

Hi ladies, I live in the uk and am about to finish my first pack of birth control pills and don't know how to get my new pack? I know it sounds stupid, but I never got a repeat prescription or even a prescription from my doctor so do I need to make an appointment with my doctor to get me a new pack of birth control pills or do I just go the the pharmacy and ask for them and they'd have them ready for me as it's been 3 months?