My Experiences

I am 15 years old and I have been experiencing these. I don't know what to call it. I usually say things and it comes true but it only happens when I've been hurt or angry, at least I think because it only happen to the people who hurt me. So usually someone says something to me that hurts me, like one of my teachers she said something mean to me and I was like she shouldn't come to school for two whole days and guess what, it came true. Then the other occurrence was when this lady embarrassed me in front of my friends because she accused me of something I didn't do and I got really mad and angry and I was like she should fall and break his back and it happen well she sprain it there are other incidents and I am starting to get really freaked out because I say mean things to people who do the same to me but at the moment I was fill with anger and rage and after a while I actually forgive them because that's who I am but at THAT moment I am really upset and I say something I don't mean and I have no idea what to think, it can't be a coincidence it happen more that 6 freaking times and I am freaking out I am insane, mental? And the worst of all i'm hurting people and I don't want to, so I google what could be wrong with me and this site came up so I decide to check it out and it petrifies me. Can someone at least tell me something?