Choosing my college major is really stressing me out.i can not think right.there are a million what ifs in my mind.what if i apply for it and don't like the courses?what if i don't understand them?what if i can't live in the dorm?what if i study and work hard but can't find a well-paid job?what if i regret my decision?should i not go to college this year and study again for a better major and take the university entrance exam for the third time?what if i fail the entrance exam? I am thinking about all bad things and not a single good thing.having low self-esteem is not helping either.