It would be recommended that you never allow yourself to be compromised, as you may risk expulsion. Be honest and open with friends, they will understand. All student evaluations are confidental. If everything is clear in their records, everything should be okay for you. If you accidentally receive a grade lower than what you had anticipated, talk to your professor.
Chances are, it was an error on their part.
If you accidentally receive a grade higher than anticipated, you are expected to have it changed to the correct one. As a college student, I feel that its not hurting anyone that I accidentally got an A instead of a B . Go with your gut on this one, as no one can offer you good advice about this issue. There are many ethical questions that can arise during the school year. If you are unsure about what to do in a situation, go and speak to someone knowledgeable that you trust.