There are many myths surrounding panic attacks and top of the list I believe are concerns that a heart attack may be the result, possibly even causing death. In an otherwise reasonably healthy person it is safe to say that death by a panic attack is impossible.
Other myths include fears that having an panic attack could cause you to literally go insane. Even if you were the unhealthiest person on this planet, insanity has nothing to do with having a panic attack.
The fact is that we are either in a panic attack or not throughout all of our lives, there is nothing in between. It is a fact that most panic attacks last a very short time, possibly a few minutes, maybe ten or even twenty minutes. Up to an hour is actually possible but very, very unlikely.
If fainting is something that does not happen to you under normal events of your daily life then the chances of a panic attack causing it to happen are as likely as winning the top prize in a national lottery. If this is something that you do regularly under other circumstances then you could not categorically rule it out.
A Panic Attack will cause me to lose control of myself
This can be quite a big fear in general for a lot of folk, and it is fairly widespread under normal circumstances anyway, but can be exaggerated even more when imagining the specific feared situation that you know brings on the start of your panic attacks.