My reality..

I am an extraordinary girl who loves singing a lot. I am a student in at "Syarif Hidayatullah"  a State Islamic University in Jakarta. My major is English Letter literature and now I am in my last semester.

*Take a deep breath*

In actuality,  I begun this major by accident.. 
When I started university I had to choose 2 majors. My first choice was Psychology, as, I want to be a psychologist. My second choice was English literature.  

Unfortunately, I failed my test. I'm not good when it comes to tests. 
I'm not really happy with my results, but My mother was so happy about it. As a good daughter, I won't show my sadness to her.

Ada beberapa koreksi dari saya. When you say English letter, you mean English literature. I have seen this mistake made before. I understood what you were trying to say, but I have made it clearer. Good work! 

My reality..

I am an extraordinary girl who loves singing a lot. I am a student in at the State Islamic University "Syarif Hidayatullah" Jakarta. My major is English Letter(??) and I'm in my last semester.

*Take a deep breath*
Actually, I came so far to started this major is by because my mistake.
It's an accident. When I went to study at university, I had to choose 2 majors. My first choice was Psychology, I want to be a psychologist. And The second choice was English Letter.

My bad, I failed in the test. I'm not really be prepared on to be tested.
I'm not really happy, but My mother was so happy about it. As a good daughter, I can't show my sadness.

Bagus cerita kecil - just a few mistakes, watch out for "in" "at" and "on." Other than that work on your tenses. 7/10!!! 

My reality..

I am an extraordinary girl who loves singing a lot. I am a student in the State Islamic University "Syarif Hidayatullah" Jakarta. My major is English Letter and now I am in my last semester.

*Take a deep breath*
Actually, the reason I came so far to in this major is because of my mistake.
It's an accident. when I wanted to study in university, I have had (past tense) to choose 2 majors. My first choice is was (past tense) Psychology, I want to be a psychologist. And the second choice is English Letter.

My bad, I failed in the test. I'm not really good at being prepared on testing for a test.
I'm not really happy, but My mother was so happy about it. As a good daughter, I can't show my sadness.

Great note Ninnu, I'm sorry to hear that. I suppose you have to make the most out of what you have though and i'm sure you will do great. Anyway here is how I would write this

"My reality..
I'm an extraordinary girl who loves to sing. I'm a student in the State Islamic University "Syarif Hidayatullah" Jakarta. My major is English Letter and i'm currently in my last semester.

*Deep breath*
Actually, I didn't originally plan to be in this major.
When I wanted to study in University, I had to choose 2 majors.

My first choice was Psychology, as i've always wanted to be a phsychologist. And the second choice was English Letter.

Anyway, it's my mistake that I failed, as I'm not really good at preparing for tests.
I'm really unhappy about it, but my mother was really happy. As a good daughter, I can't display my sadness.

Hope this helped! keep up the good work