Oh, I see what Eram is talking about:
My life in United State was more incredible then I thought.
Look, you also need to change then to than! :-)
I still remember there was a period of time that I just hoped some accidents would happen to end my life. ---Wow, this is dark and gloomy! When you hope for this, you must really hate your job! Well, I guess it is time to start doing work you really care about. I bet you would be able to do very goodwork with bilingual children.
Everything in this world is based on the law of 'cause and effect'.
I want to tell you about the verb tense that uses the word "had."
Then, one day, I realized that the life in my college' days was totally different. I thought, "I used to be an active and very happy girl." I realized that I
had lost myself and I wanted to recall those days.
REALIZED and WANTED happen in the past tense, but LOST happened an even longer time ago. When you are remembering a situation in the past, and you mention something even further in the past, you need "had."
Oh, actually I see that you already understand this rule, because you used it perfectly here: Sometimes, I think if I hadn't felt a deep sense of isolation during my working days, I would never have had a chance to study abroad and to realize my life is amazing.
Have no doubts as you continue with your work. You are obviously going to be a success in what you do!
I notice you mentioned EssayForum in your essay! That is really nice, thank you.