I felt the same way in college. But you'll surprise yourself. Did you ever think you'd get into a top school? I didn't until it happened. I didn't think I'd get a job after college...until I did. I never thought I'd hold it down and genuinely be successful...until that happened. Believe me, especially in a field like CS, you are not expected to look like Brad Bitt or speak like Cicero. If you have the skills and commitment, you'll do very well.