I was under a lot of stress earlier today and had some caffeine as well…as I was talking to someone about what was stressing me out so badly, I almost fainted 3 times. My heart was beating very hard, although only slightly faster than normal. I was shaking and felt like I couldn’t breathe right. I always have floaters in my eyes because of an astigmatism, but they got much worse during all this. Since that happened, I’ve had a very fatigued soreness in both my legs up to my lower back to where I don’t feel like I can even walk (as if I’d just run a marathon). I do have diagnosed generalized anxiety, but have not experienced something like this before. Are these symptoms of a panic attack? If not, are they symptoms of another illness?