yes i get these spams its like your whole chest is caveing in i also have ventrictular tackycardia and fibro .. i have been told that its a mixtured of the fibro rsd and heart problems but i have not found anything in 10 years that makes it go away or any less painful . im very sorry that you re goin thro this the best thing that i can say is just concentrate on breathing as slow as you. so sorry that is happening