Correcting as a translation.

Below, I will narrated a encounter that I had. When you work with a lot of people, especially working at a hospital, you meet all types of people. 

下面是我会讲述我曾经遇見到过的一件事情。 当你和跟很多人一起在工作时，尤其是在医院裡，你就会遇到各种不同类型的人[物]。

If you want to be a doctor, patience is really the key.
I will try my best to understand. Even if a person do me wrong, I will try my best to understand.

如果你想要成为一名醫生，真正的关键是有耐心真的很关键。
我会尽力去了理解他们别人, 甚至对我 不善, 我也会尽量去諒解。即使有人对我有所误解，我也会尽力理解他们。

At the hospital, I am often assigned a Chinese patient because I am the very few students who are learning Chinese. My oral speech is okay, but they too also know a bit of English, so it all works out. However, this time I made a common mistake.

我在医院裡经常有华人被分配給我照护指派为中国病人看病,是因为我 是其中极少们当中为数不多的学习中文的学生。
我口语还好而病人他们也会说一点英文，所以也沒有什么不会有太大的问题。不过这次我犯了一个常见的错误。

A person got angry at me for telling her that “Your x-rays will be ready -- later".
My real meaning was to come tomorrow. She thought she'll get it before she left. She quickly got mad at me and threw a lot of words at me in English. “Saying how come it isn't done? Why are you so slow? Are you trying to make me waste my time? What do you mean tomorrow?”

有一[次, 一]个病人对我大发脾气，因为我告诉她 "Your x-rays will be ready later".我原本的意思是(让她）明天回来拿。可是她以为她在还沒走之以前就能拿得到。很快，她就反脸对我生气了，用英文大声地來谩骂我, 。她骂道 “Saying How come it isn't done?"Why are you so slow? Are you trying to make me waste my time? What do you mean tomorrow?”

I didn't argue back, but I tried my best to calm her down. Eventually she did and left with a frown on her face. I went home that day and was sicken by her attitude. I couldn't help myself, so I wrote it down.

我没有反駁跟她争(论）， 不过我尽力试着让她冷静下来。 慢慢地，她终于冷静下来了，最后带着一脸的不悦的脸而离开了。那天我回到家了，我被因为她的态度 震動感到很不开心。 难以控制心中情緒 我不知道该怎么发泄，所以就写下来了 因此以书下此作为发泄。

回看我的上一篇的文章，現在我就明白了她为何会生气。我做犯了一个错了。她是应该由我的负责者。我犯了一个（文化差异的错误而），不能怪她。我要恆心去确实在学习中文，但我不能放棄松。因此要採用多些为（这件事），我花更多的[can't use 花, implies a waste of time.]时间来学习中文与文化[not only the language but the cultural views as well]。我不想让这种事情再发生了 or 重復

Chinese + English translations (very long)

First thing, it is not about me.
Second thing, thank you for your time~
Third thing, it is extremely long. Look down!

-------------------
Below, I will narrated a encounter that I had. When you work with a lot of people, especially working at a hospital, you meet all types of people.

下面我会要讲述我遇到过的一件事。
当你跟很多人一起工作时，尤其是在医院的时候，你会遇到各种类型各种各样的人。

If you want to be a doctor, patient is really the key.
I will try my best to understand. Even if a person do me wrong, I will try my best to understand.

如果你想要成为一名醫生，耐心真的很关键。
我会尽力理解他们。即使有人对我有所误解，我也会尽力理解他们。

At the hospital, I am often assigned a Chinese patient because I am the very few students who are learning Chinese. My oral speech is okay, but they too also know a bit of English, so it all works out. However, this time I made a common mistake.

我在医院经常被指派为中国病人看病,因为我是我们当中为数不多的学习中文的学生。
我口语还好，他们也会说一点英文，所以也不会有太大的问题。不过这次我犯了一个常见的错误。

A person got angry at me for telling her that “Your x-rays will be ready -- later".
My real meaning was to come tomorrow. She thought she'll get it before she left. She quickly got mad at me and threw a lot of words at me in English. “Saying how come it isn't done? Why are you so slow? Are you trying to make me waste my time? What do you mean tomorrow?”

有一个人对我大发脾气，因为我告诉她 "Your x-rays will be ready later".我原本的意思是(让她）明天回来拿。可是她以为她在走以前就能拿到。快，她就对我生气了，用英文大声地谩骂我。她骂道“Saying how come it isn't done?"Why are you so slow? Are you trying to make me waste my time? What do you mean tomorrow?”

I didn't argue back, but I tried my best to calm her down. Eventually she did and left with a frown on her face. I went home that day and was sicken by her attitude. I couldn't help myself, so I wrote it down.

我没有跟她争(论），我试着让她冷静下来。 慢慢地，她冷静下来了，最后带着一脸的不悦离开了。那天我回到家，因为她的态度感到很不开心。我不知道该怎么发泄，所以就写下来了。

Looking at my previous writing, I understand her now. I made a mistake.
She is my responsibility. I made a cultural mistake and cannot blame her.
I am definitely learning Chinese, and I shouldn't slack.

回看我的上一篇文章，我就明白了她为何会生气。我犯了一个错。应该由我负责。我犯了一个（文化差异的错误），不能怪她。我确实在学习中文，但我不能放松。因为（这件事），我花更多的时间学习中文。我不想让这种事情再发生了

Excellent.几乎不需要修改，只修改了很小的地方，以便读起来更通顺。

当我看到"Your x-rays will be ready later"的时候，我也以为应该在当天就可以拿到了。这确实是个文化差异。

加油！你的中文已经非常棒啦！

BTW：是不是如果你说"Your x-rays will be ready soon"就代表当天可以拿到报告了？