The wonderful thing about having confidence is that it can be your secret weapon for getting through tough challenges. But right now you need to keep that confidence in check. Make sure it doesn't veer over into cockiness. Be honest with yourself and admit when you can't do something. You do have limitations, as shocking as that might be! It's much better to acknowledge them to others than to have others point them out to you. Be self-aware and you'll be more attractive to others.