Shaking, blurred vision, dizziness?

Ever since Tuesday, I haven't been able to stop shaking, most noticeably in my hands. It's not even slightly shaking. It's horrible shaking, ex.: I was trying to do my homework in study hall today, and I was using the calculator on my iphone, but I could hardly type, I was shaking so much.
But anyways, I also get occasionally dizzy. Like after I spent a day at an amusement park riding rides, like you still feel like you're on one. And when I sit up, I'm dizzy.
Today I was heading to first period, and my vision was slightly blurred. I thought it was just something in my eye, but I kept blinking, and trying to get whatever was in there out with my finger, but there was nothing, and the blurriness remained.
Any idea as to what is going on? Could it just be stress? (I just recently moved to a new state, and Tuesday was the first day of school.)

See a doctor

Could be diabetes, an adrenal gland disorder, some kind of food intolerance or, yes, it could be stress.

But the only way to find out is to see a doctor! Try not to worry - you are young and it is unlikely to be anything too serious. But if it is they will be able to treat it.