Please translate/correct this for me to Japanese. I will choose BEST ANSWER for sure?

Question:

Today, I had a biology test in the morning.

"I need to study very hard for the test!" I thought.
“Watashi wa shiken no tame ni isshoukenmei benkyou shinakereba narimasen!” To omoimashita...

So, I couldn't sleep long.
Desukara, nagaku neru koto wa dekimasen deshita.

I only slept for like 4 or 5 hours...
And I studied after school with .... for 2 hours... (which didn't really work but that's no problem)
In the end the biology test went really well, too well.
Fren (my friend) didn't even learn and she thought it was easy.
I bet everyone has a higher mark then me, even with all my hard-core studying.

This is all before you leave...
And please add kanji and hiragana. PLEASE.

Answer:

Today, I had a biology test in the morning.
今日は午前中に生物の試験がありました。
"I need to study very hard for the test!" I thought.
”試験のために一生懸命勉強をしなければ”と思いました。
So, I couldn't sleep long.
それで、長く眠れませんでした。
I only slept for like 4 or 5 hours...
４～５時間ほどしか寝ていません。
And I studied after school with .... for 2 hours...(which didn't really work but that's no problem)
それと、学校が終わってから友達と一緒に二時間勉強しました。（実際に効き目はない…
In the end the biology test went really well, too well.
結局、生物の試験はとても良くできました、できすぎたぐらいです。
Fren (my friend) didn't even learn and she thought it was easy.
友人のFrenは習ってもいないのに簡単すぎだと思いました。
I bet everyone has a higher mark then me, even with all my hard-core studying.
こんなに徹底して勉強しても、みんなは自分より高い得点をとっているでしょう。

you're welcome! ;) it's good for me cuz i'm learning english.