thanks guys for reply.

here is my situatation, I came to US in F2. I changed to F1 and have been maintaining my status since then with good GPA. now I am a nurse working on OPT. I really want to goto nepal in summer. I really want to stay in F1 but I do not want to take a chance for visa. I do not know how hard it would be to get F1. I am really nervous. I can't decide what to do.