I finished my exam. I Finished My Exam

I had have studied for 2 months, including all weekends (<--- confused with this sentence, what were you trying to say?) because I had to prepare for a exam.
I needed to the certification a t work
It was really hard for me to study on weekends.
Today, the exam was finished, so I am felt very happy.
I am taking a rest at home ;)
I hope the exam result will be good!! I'll make it up.
시험 결과가 좋았으면 좋겠어요. 꼭 합격할 거에요.

My exams have finished.

I had studied for 2 months and even on all the weekends. Because I had to prepare for an exam.
I needed to get the certification at work.
It was really hard for me to study on weekends.
Today I have given the exam (or exams are over), so I am very happy.
I am taking a rest at home ;)
I hope the result of my exam will be good!! I'll make it up.
시험 결과가 좋았으면 좋겠어요. 꼭 합격할 거에요.

I finished my exam.

I had studied for 2 months all weekend long. because I had to prepare for an exam.
I needed to the certification a t work.
It was really hard for me to study at weekends.
Today the exam was finished so I am very happy.
I am taking a rest at home ;)
I hope the result of the exam will be good!! I'll make it up.
시험 결과가 좋았으면 좋겠어요. 꼭 합격할 거에요.