Aw haha well first of all, don't worry. When I had my first period, I was playing on club penguin. My lower stomach had been feeling really weird and uncomfortable for a few days and then I went to the bathroom and yup. So don't worry about it, just wait and then if you go to the bathroom and you see blood which could be really dark (almost brown) then you're on your period! But don't be scared.
Don't worry! Sometimes cramps happen! But when you do get it, don't freak! It can vary in colors. Brown, dark red, and bright red. But don't worry! Be prepared by wearing panty liners or bring them with you wherever you go.
Yes, im 13 and i started about a 2 months ago, but i didnt have any pains before it happened ( probly cuz i was asleep ) but when i woke i had really badd back pains. Some people have back pains while others have it in their lower stomach. If it starts to hurt REALLY BAD then take some ibphrophen or aspirin. Drink water and put a heating bad on where it hurts. Try taking a nap it helps the pain(: and wear a pad when you sleep or while you are awake if it makes you feel comfortable. Hope this Helps!