First Time Failure

Would you believe after spending 26 years in the Service, I have finally failed to finish a required school? The work isn't that hard but at the same time you need to pay attention to detail. Well I failed the first test, but you know they give you a second chance. I studied for the second test as well as the school made me attend a three-hour block of instruction that night before. Going over the material that night with instructor I felt pretty good and I felt I knew the material at that point pretty good. Test time come I know I started off good been then stressed a little bit but not enough to lose control of my thoughts. Felt good when the test was done and thought I would have enough points to pass but when they came out from grading my test and showed what mistakes I did I was very upset with myself because it was so easy and just couldn't understand how I sat there and marked the answers wrong. It's two Days later now and I'm still feeling very low. I been thinking to myself how I can go back and face people who look up to you every Day for answers and guidance. So far there are some people who has supported me on this and I know I will be fine and ready to go back to that class when I get the chance to.