Well, that is how I feel when I have a panic attack, but it is also exactly--and I mean exactly--how I feel when my blood sugar gets too low.
I have had blood tests to rule out hypoglycemia, and they all came back normal. But one day I had an attack, and passed out in Walmart! I fell into a rack of clothes. Thankfully my mom (a nurse) was with me. She hot some food and juice into me and I was fine. I went to the doctor, and they said for some reason my sugar levels aren't low enough to register as "bad" but it still obviously affects me as though I had full blown hypoglycemia, and so I should just treat it as such.
I have to eat something every 2-3 hours, something with protein, fat, and complex carbs together. As well as staying hydrated. If I skip a snack or meal, I have what feels like a panic attack. Also, I've noticed now that I am getting older, having too much sugar has the same affect on me.
Managing what I eat has enabled me to stay off medication.
Let me add though that there was a time when I had anxiety coupled with depression, and what I ate had no bearing on the attacks, It truly was panic attacks, whereas now it's blood sugar issues. You can figure out which it is by trying the eating every 2-3 hours thing, protein, fat, complex carbs, and see if it gets better.
Mama to "The Fantastic Four":
DS 02
DD 06
DS 09
DD 12