Disappointed about Academia I was a first-year PhD student but was forced to quit although hard-working day and night! I am disappointed, I am now 27 and did not create family, left my home country. Problems from the past in my family hugely affect my mental health. I have OCD and some other health issues. 

Everyone admires my personality in presenting my work, however I am now shocked as I dreamt of doing good research to really help people and imprint a memory before leaving this earth. But I found it does not look like that. When I was a little girl, I used to tell my late mother: "I do not want to be an ordinary person, I want to add this world, to become an important person".

However, while writing now I would burst in tears and feel deeply alone. I suffered from complaining, so I would forget to speak and grew used to keeping every thing inside. I am afraid for my family as I feel responsible and I would like to make their lives better. Maybe the problem was that I did not do as well as the others? I thought I could do something new and meaningful, but I ended up being kicked out.

I would be grateful if someone tell me how can I overcome this harsh period?
What you state here is something that many do indeed feel coming into academia. The image of research as being something greatly impactful on an individual level is a bit of an illusion. We only hear of the famous researchers, and not of any of the hundreds of thousands overshadowed in every field. Further, the process of research can actually alienate you from the fruits of your labor. Even if you do impactful work, you likely won't feel it or see it in a favorable amount of time. Those that seem to fare well in academia are those that are content with the reality of the dynamics involved, and enjoy what they really do.

I will say that from what you describe, however, your mentality towards work and life in general seem to be quite unhealthy. Indeed you have tragic circumstances that led to this, but its something you should work on with a therapist. The will and need to change the world for the better is definitely a common motivation, but not one that should be above all other reasons for a persuit, because its a goal that is almost by definition impossible to achieve to one's degree of personal satisfaction.

I doubly recommend therapy to help with loneliness, and making steps towards reaching out to friends and forming support groups, because the work load involved in grad school can be isolating. As a second year PhD student, I really recommend going out of your way to find people.