Thx, I'm havin an anxiety attack as I write this.. a sudden rush of anxiety just comes over me.. I hope these ADs subside that as well. I can't tell if they're panic attacks or not but its horrible. It just comes on like my heart suddenly beats extremely fast & I feel light-headed. I'm not hyperventalatin (to the extremeties of what people do) but I'm heavy-breathing . It tends to happen more when I'm fatigued but it happens regardless ..