dark point..

From the first day i reach here, i am so afraid on about my study..
many question playing in my minds..
Can i catch-up with all the subject i take?..
Can i get high marks or at least well marks in all my quiz and tests?.
Can i get along with my new friends?.. every day i will thinking the same things..
i'm not confident with myself..
this is because i can't remember some of what i've learned 3 or 4 years ago..
it turn worse, when i can not adapted the way of study here than at my old place..
it's so fast and almost subject teached in english language..
i feel so terrible n so pressure..
i need some one to guide me in all subject..
i hope Allah S.W.T will send me someone to help me..