Aww dont be!!! Well I dont know. when I started mine It did not end up like that! I only had cramps but girls do start periods diffrently too others. Have you asked your mum? You might just have the flu.
Don't be scared to tell your Mum! I'm sure she'll help you, and if it is a sign of starting your period ( I don't know I havn't yet been through it ) remember, she's been through it all.
My advice is tell her, sad don't feel shy, it's part of a womens nature ^_^
Ok. Go for it girl! Get it over and done with - there's nothing to it. It just your body's odd way of showing you that your turning into a women ^_^ Nothing to worry about. All girls will go through it at some point. Please read my PM..
You should have got the PM now. Just talk through exactly what happened, don't feel shy. Just tell her that you have had a bit of well... gunk in your knickers. She'll probably talk through exactly what a period is, and tell you your turning into a women, which is bascically what a period is.