Hi all.
I too suffer constant anxiety and severe depression
It can be such an horrendous job living with anxiety especially when it strikes you hard without warning or influencing factors.
The feeling of impending doom is always set in motion along with chest pains etc,
The feeling your going to just die is the most horrible sensation I think a person could feel.
However, tell yourself I am not going to die, I know it easier said than done at the time.
The worst that can happen is you faint, actually this could be a good thing, of course as long ad your not driving or anything, if you did faint, your body would begin to relax and your body's natural functions would return to normal.
Even so, it still does not warrant the fact that you may be experiencing the worst emotion you could ever feel.
Had mine for ten years, it has improved slightly but I find it worsens after a night out or a few drinks, as alcohol is a depressant,
Good luck to each of you