Angry and a Nervous Wreck

It is my final year in school. I have to honestly say that my results are definitely not that good. I have less than 200 days left before my final exam and I feel absolutely anxious. I'm a nervous wreck. Usually, I feel fine most of the time but my mood is really changeable and unexpected. Well, that goes without saying for being a Cancer sign. I get angry at any annoyance at school and talk it out in my brain. Being a girl, I am expected to help around the house and I do. But this year, I asked my mother to ease out all the house chores for me, just let me do simple ones because time for everything is important to me. She agreed and for some time it went on like we agreed, but nowadays she's asking me to do more chores. I do it anyway because she's my mother and she needs help since she's working, but the thing that I don't get is that I am not the only daughter. I have two other sisters that are perfectly sane and healthy to help around the house but they are not doing anything. My mother scolds them at times, but since they wouldn't do anything even after being scolded my mother just gives up and scolds me instead. I do the work when asked and gets scolded. They, on the other hand, do nothing and gets away with it. I just feel sick and tired when this happens. I am already at an emotional brink and people scold me yet other people who has the same responsibility as me are seemingly getting away with it with such a happy conscience. I can't do anything about it. All I can do is get angry and hit things. You see, my results right now are insecure. My grades are not to be proud of. If I fail to pass in my final exam, it is the end for me. I won't be able to attend university. I might as well give up on my dreams and kill myself when that happens. I'll be in a dark well that I couldn't climb and I'll be stuck there forever. That is why I need all the time in the world to study, relax, do revision, do homework, play, read, do some hobbies, enjoy being alive while still studying. But doing all these chores by myself is making me sacrifice some of these things that I figure would ease my stress and help increase my grades. When I'm told to do chores, I do it with an angry mind because I thought I had an agreement and I can't control my emotions and I cry. When I'm angry and I cry I can't study anymore because my mood is unsuitable. Being a Cancer, I am quite emotional and my anger stays and that's the only thing that I think of for the whole day. So studying is impossible in this situation. Even trying to relax and play is impossible, because I'll still remember about my anger and won't enjoy relaxing. In fact, I'll just get angrier and feel like killing people.

Well, maybe I'm like this just because I'm on my period. I realize I do get particularly angry and emotional during this time of the month.

Music and horror stuff could help, I think.