I've never had another period?

It can definitely be normal. When my youngest started her period she had one and then didn't have another for 8 months. Mention to your mother that you'd like to talk to your doctor about it. But otherwise try not to worry!

no it's NOT normal......if you eat potato chips and sodas and all the junk food you can gobble up, then your body cannot have a cycle.......once the junk food catches up to you, you;ll start getting weird symptoms that the doctors can't figure out....you NEED normal food like restaurant food, not fast food junk. 3 protein meals a day breakfast, eggs, bacon, toast, 4oz juice only, fruit. lunch, grilled chicken, baked potato, veggies,fruit...supper beefburger, baked potato,veggies, fruit for basic diet. no sugary drinks, no milk and within 2 days of eating like that, you'll notice you have no cravings and any issues you had have mostly faded [ notmilk.com ] and read on allergies and related health issues

Well, I have to say that after my first period, it doesn't come until three months later. Thus it is quite normal that after the first period, you have to wait for a little bit long time. But in my point of view, a year seems too long, so I advise that you should tell your mother firstly and consult your doctor.

You should tell your mother