So about a week before I start my period I get sore breasts which is normal for me and now I get cramps, they only last for a minuet but it happens a few times a day . I'm 15 btw
the symptoms you are having are most likely caused by PMS (premenstrual syndrome). you can get cramps, mood swings, and other period-like symptoms as you approach your period. it is perfectly normal :)