You should not fear failing, if the professors can take the exams and score perfect scores you can also. How are your grades now? You should be getting all A's! Do you work also or are you able to devote all your free-time to your studies? My suggestion to you is to stay in school as long as possible and get all A's and everything will work itself out in the end.
I must confess I fear failing. This anxiety is part of the reason I want to quit. Next semester I would be taking Calc 2 and Linear Algebra. I would like to learn linear algebra for the graphics applications.