I've struggled with dysthymia and major depression on and off for a few years, and I feel anxious sometimes like anyone does, but it's never been too much of a problem.

I'm a freshman in college, and I have one discussion-based class. A few weeks ago, I was to present some information in front of this class. I've presented things in class many times before in high school, but I had never had such an intense reaction as I anticipated my turn to speak. For an hour I was fidgeting, constantly clearing my throat because it felt really tight. I kept drinking water because my mouth was so dry that I was afraid I wouldn't be able to speak when it came to be my turn. My face flushed horribly red, and my heart was beating so fast that I thought I was going to give myself a nosebleed. I was sweating. I had the urge to just jump up and run out of class.

I tried to take deep breaths, but it didn't calm me down. It only made me more anxious, thinking that other people could see how worked up I was.

When it came to be my turn to speak, I believe I got the words out okay because I had practiced a lot the day before.

Does anyone have any idea why I suddenly had this reaction? It was really inappropriate to how short of a time I'd be speaking and how I wouldn't have failed or anything if I had just given it a shot.

I'm supposed to present something else in that class tomorrow, but my fear of a panic attack kept me for even preparing for the class so I could just skip it. I really don't think I have an anxiety disorder, but I've never experienced anxiety that powerfully before, thankfully and unfortunately.

Ideas, anyone?