Breast Clinic

I’ve had a non healing skin lesion on my breast for over 3 weeks. The GP has referred me to the breast clinic as it’s not gone after a course of antibiotics. I was referred today and already have an appointment. I’m concerned it’s a skin problem - rather than a breast issue. Will the breast clinic refer elsewhere if that’s the case? I don’t want to waste anyone’s time and feel like the department is busy enough as it is without me attending for a non-breast related problem?