Is this just Anxiety? Or is it something more?

Last night I was laying in bed, and all of a sudden my chest felt tight, like I couldn't breathe, my back started aching (as if it was being snapped in half slowly) my ear ached and my mouth kept opening and closing of it's own accord. My heart was racing and I was shaking visibly. It wouldn't go away even though I tried my anxiety breathing exercises. I ended up falling asleep while it was still going on. I woke up this morning, and I have a major migraine. I could only eat three bites of my toast and the shaking and heart racing is back and I feel like I'm about to burst into tears at any moment. What do I do, whats wrong with me?