Public Speaking Blunder

I blundered through my presentation today. Public speaking is considered one of my fortes, so you can imagine how angry I was with myself after the screw up. Prior to my presentation slot, there were four other presenters, all of whom were excellent. To add on to my nervousness, the person who first presented chose the same topic as I. Because of my anxiety of not reaching the benchmark set by him, I blanked out after my second sentence. This consequently triggered a chain reaction, which impeded my flow of thought. I ended up reading from my note card, which lacked substantial point to back whatever I was saying. As I moved on in my speech, I made noticeable pauses looking at the audience desperately. I was considering walking out and giving up. But I...