Going to get contraception from a service is perfectly normal. You shouldn’t be embarrassed to be seen doing this – it’s a healthy, mature thing for anyone, especially a young person to do. If you are concerned, think of reasons you’re there (e.g. You’re doing a mystery shopping exercise.)
Staff at services will be friendly and professional – they definitely won’t judge you, and they see young people getting contraception as a good thing – it means you’re taking care of your health!
Try and be clear about what you want, that way you’ll be able to find out what’s the best option for you.