Suggest Remedy For Delay In Starting Menstrual Cycle

What will doctor say or do I'm turned 16 in October and I haven't started my period yet, my mum told me that she might take me to see a doctor/nurse I have this weird phobia of not like going to doctors and it makes me nervous; this is why before I go I'd like a little insite in what it's going to be like. Like I said I havnt started yet, I've hat symptoms and that, what will a doctor/nurse do to check if everything is okay with me And is it normal I havent started yet although I'm not really bothered.