Am i close to getting my period???!!! PLEASE help!?

I'm 11. My mom got her period when she was 11. Ive had discharge for about 7 months. i first got the discharge on my birthday in 2010 which was December 1st.My hips have grown a lot wider (i went from a size 8 slim in jeans to a size 12 slim!) and i have curves now. Im really moody and have been getting bad lower stomache aches. My mom says that the 'period zone' and that i will get it sometime this summer but idk i just wanna make sure. So yeah i go through these wierd mood swings and gained 20 pounds in about 4 months! My chest has grown up 1 bra size, now im a 34A. I had this growth spurt and got like an inch taller. So when do you think ill get my period? thanks in advance!