I am 12 I started my period in maybe April and then havent been on it sense then and I have white stuff in my underwear and it smells it's October now what do I do!
It sounds like discharge (not sweat), which is normal at this stage and your age. You're going through puberty, for sure. Once your periods come and your breasts develop to the point of needing a bra and the size not changing very much, then you can say you are through puberty. Expect your periods any time -- watch for low cramping in the front of the lower abdoment. (If you have underarm hair and breast development, periods are the next thing.) There are probably some good educational websites out there that you could Google on puberty timelines and the like. Good luck!
You are defiantly going though puberty. I can't tell you if you are close to a period or not, but it is normal for your vagina to hurt a little, breasts being tender, having a discharge etc during puberty because your body is developing, into a young woman. I didn't start my first period until I was nearly 13, so you will start your periods when your body is ready to, but you should defianlty start your periods before you are 16. When you do start your first period, you will see a red discharge and for the first two years after you start your first period, the periods will be not be regular (every month) because your body is still developing. Why don't you speak to your mom about what you are going though because she has been though this herself and will understand what you are going though and will be able to help you, for example, give you a idea when you could start your periods because my mum did, just before I started my first period!!