Am I Having Anxiety Attacks?

I am a 25 year old teacher and for the last year I have been getting fits of the shakes during lessons. They are becoming more and more difficult to hide or control and it is beginning to affect my delivery of course material to my students. I don’t get any other symptoms but on days when the shakes get really bad I do sometimes feel light headed and somewhat nauseous. I haven’t as yet had to leave the classroom, but I am sure one day soon I am going to have a serious turn and either faint or burst into tears. Does this sound like anxiety attacks? Does anybody else have this problem, or know how to deal with it?