What is going on

I''m going insane.. it like i cant even control the stuff that comes out of my mouth. like today i blew up at my little sis for no reason and got in to a big argument that had absolutely no point. I literally had no idea why i started the conflict. And all of a sudden i developed frequent heartburn, i can't eat anything without feeling discomfort afterwards. And i lost all motivation to work out/train. Usually I'm athletic and proactive but now I'm like a fat lazy mess. I'm planning my sweet sixteen so i guess that is what got be so stressed out lately, since no one is helping me but expects me to get all the detail done. I am about ready to pull my hair! this is CRAZYYYYY!