Normally, my attacks are pretty random and mild - racing heart, quick breathing, and gone within minutes. 

But these last few days, I've felt just all around crappy. Not sick, but crappy. When I'm sitting still and calm, it feels like something is sitting on my head and chest. I can't breathe very well. My heart rate is normal.  I'm dizzy. These feelings are constant, and I can't find any relief from them. But on top of them, I'm still having my random attacks.