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6 days of sickness. ６日間の体調不良

For 6 days, I was sick =/. 　６日間も体調不良だった。
I didn't know what it was but I have never had a sickness like this before. 何なのか分からないけど、こんなに体調不良になったのは初めてだ。
Every year when summer comes I always get sick, even though in the Winter I rarely wore shirts!

毎年夏が来ると体調不良↓　冬にTシャツ着なかったのに。
One day, during work I suddenly started feeling cold.　ある日仕事中にいきなり寒気がした。

Since I work in a medical unit within the jail, I couldn't tell if I was cold because of the air conditioner or if I had a fever or somethin.
刑務所内の医療班で働いてるからエアコンで寒いのかどうかよくわからなかった。
The next day was my brothers college graduation,　次の日は弟のカレッジの卒業式だ。

I still felt like crap.　マジ最悪な気分なまま↓

My temperature was atleast 100, but I couldnt miss a day like this.

体温100度（以上）はある、でも絶対こんなこで見逃すわけにはあかん。（関西弁しか思いつかんかった）

It was too important for him.

(Why do you use "too" here? It sounds negative to me..)弟には大切すぎる日だ。

After the graduation, my fever broke and I thought I'd be fine... 　式後、熱も治（おさ）まり、大丈夫と思った。

Until I started headed towards work.　仕事場に向かうまでは。

The fever came back and it was worse. 熱が戻ってきて、前より悪化した。

I was shivering like crazy,　やばいくらい震えてた。

It felt like an earthquake inside my body.　まるで体の中で地震が起きたみたいに。

When I eventually got home, I was down for 6 days. 　家に帰ってから6日間寝込んだ。

It sucked ass.　マジ最悪だった。