I think most of us felt that way. Exam day nerves, imposter syndrome, questions that felt like there was no context. I studied more for the CAP exam than any in my life. At least that is what it felt like. I was in my 50's when I took it and it had been a very long time since I had sat for any type of exam. I also did not feel confident when I finished. The exam is complete. You've done the hard part. The next few weeks will be long and anxious while you wait on the results to come sometime in May. Celebrate yourself. Do a braindump and then set it aside. While that advise is easier said than done, trust me - it helps. You are the same, capable, confident admin today as you were when you walked into that exam centre. Push the doubt aside and celebrate, celebrate, celebrate.