Ttoday's Eencounter  (Capitalize titles)

Ttoday,Ii feel very very terrible.Grabing one order is too difficult.Ii have tried my best and worked overtime many days for ("on this project" sounds a little better, but "for" is not wrong) this project. Bbut finally,Ii was informed (that) we lost that project!! I contributed most of my time to it,but there is no return.Ttoday,Ii feel very horrible and desperated desparate (I am not sure what you mean here and there may be a better word for it,).Ii have no idea how to face tomorrow and continue my following works. Ii have enough patience to wait for a good result.However,the result coming out of this does not satisfy me, and is even against my expectations.

Good Job!  Be sure to leave spaces between periods and the start of new sentences.

Be sure to capitalize the first letter of new sentences.
Be sure to always capitalise the first person pronoun "I"

today's encounter

today,i feel very very terrible.grabing one order is too difficult.i have tried my best and worked overtime many days for this project.but finally,i was informed we lost that project!!contribute most of my time to it,but there is no return.today,i feel very horrible and desperated.i have no idea how to face tomorrow and continue my following works.i have enough patience to wait for a good result.However,the result coming out does not satisfy me,even against my expect.

I've just done a straight rewrite as another example of how you can express these thoughts.

Today, I feel very discouraged.  Even taking one order feels like a difficult thing to do.  I have tried my best and worked overtime for many days on this project but despite this, I have been informed that we have lost the project.   Even though I have contributed a lot of time to this project, there has been no return.

I am feeling very sad and desperate right now and I'm not sure how I can even continue working. I am patient enough to wait for a good outcome, but, the outcome of today has left me feeling disappointed and dissatisfied. 

This is very good. You have a strong ability at describing your emotions and feelings, and the sentence flow into each other clearly.  Well done!  I hope everything works out with your job. We all have days like this at times, so be encouraged.  Your hard work will pay off!