Extremely Stressed

Is
I know I'm young and I probably don't have much stress to have but lately I feel like I've become more and more stressed. First off, my eyes have been swelling up with dark circles under them. This happened a couple years ago as well. I seen a doctor and we did allergy test. Nothing came up. They almost decided to put me on anti depressants until it cleared up. During that time I was in trouble and my mom was a hard ass on Me. I let it go though and it cleared up. Now I have a week before my cheer state competition and its happening again. I feel achy and sore I'm tired and my eyes are starting to get puffy again. Ok this is weird... I'm litterly having dteams about killing people. Not that I want to but I'm feel so stressed. I read that dreams of anger or murder can be from stress. Help!!??? Any one