Am i close to my 1st period?

ok im 12 and ill tell you some stuff... Ive been having cramps.. HORRIBLE ONES! been getting dizzy, moody.. I think PMS.. hungry more, legs hurt, boobs hurt, feet hurt, stomach hurts, crabby, 99 lbs..( is it true that if your 100lbs you get your period?? I dont believe it...) boobs for 2 years, discharge for 1 adn half year...my discharge comes out clear and slimy, and its kinda like a yellowish white....my cramps have been getting worse, and strong, and getting them alot now... am i close???????