Well also keep in mind that having gone through an Engineering program, all other things put aside, you know how to open up a book and learn hard things on your own. This means that anything that you do not know and need to know you can learn in short order. And as has been pointed out do not look to your short comings, real or perceived, look to your strengths. There are plenty of people who will be happy to tell you whats wrong with you, generally just ignore them.