@over opinionated ...seaufke's on her period

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then explain about half of them to me ;/

It's different for each person, so nobody can tell you precisely. I got mine when I was 12, I think. And it was no big deal because I have three elder sisters, so I was prepared. It's just that someday you go to the bathroom to urinate, but you spot the blood stain on your underwear. Nothing, just change your underwear and wear an absorbent pad for the start. As for the rest, I think your mother, sister, aunt, or any other available woman in your family will tell you better. If not, maybe you can ask your teacher (if you have any that you feel comfortable talking with).

I get cramps, blood comes out like a waterfall, it lasts for like a week. Hope u get those 'light' periods.

getting a huge punch in the gut

Don't worry about puberty yet. 10 is when the small things start to happen (e.g. the upper areas). Your period will come between the ages of maybe 12-14. The first time you get your period you'll probably have a heart attack. It'll look like a couple of brown stains on your underpants. Just make sure you're prepared, and make sure you have your period bag with you. Inside your period bag, make sure there's a spare pair of underpants and some pads. If you have an older sister, you can ask her when she got her period. If you're really worried, go talk to a teacher or a family member. :)