How can people make snesible decision about their future.

Everyone always holds the nice hope on her/his futures. Like a friend of mine, looking forward to becoming the beautiful mum; another friend want to go to university then find a good job. What shall I do? From outside, people think I am in the very good situation - getting married with a not so bad person; at least having a job; very caring families around me. However, I really feel I am suffering so many difficulties now. I am losing my confidence gradually since I start this work. I am always worrying if I speak right and clearly. It is so stressful situation. How can I do in my future? Why is my life so hard? It is really not easy for a foreigner to work in a place where they look at you in a different way. Should I continue to keep quite standing in a corner or to bring myself back.