"Emotional symptoms of anxiety
In addition to the primary symptoms of irrational and excessive fear and worry, other common emotional symptoms of anxiety include:

Feelings of apprehension or dread
Trouble concentrating
Feeling tense and jumpy
Anticipating the worst
Irritability
Restlessness
Watching for signs of danger
Feeling like your mind’s gone blank
Physical symptoms of anxiety
Anxiety is more than just a feeling. As a product of the body’s fight-or-flight response, anxiety involves a wide range of physical symptoms. Because of the numerous physical symptoms, anxiety sufferers often mistake their disorder for a medical illness. They may visit many doctors and make numerous trips to the hospital before their anxiety disorder is discovered.

Common physical symptoms of anxiety include:

Pounding heart
Sweating
Stomach upset or dizziness
Frequent urination or diarrhea
Shortness of breath
Tremors and twitches
Muscle tension
Headaches
Fatigue
Insomnia"

Credit: Helpguide.org.

I think that illness (like when you get nauseated) is your trigger for an anxiety attack.

So yes, the physical aspect of an anxiety/panic attack are very real. Also the triggers for them may be unrecognizable....like for me, there doesn't seem to be one at all that I can find.
There is medication available that you take every day (I do) or there is medication for when you feel an episode coming on.

I have not sought therapy for it, so I can't speak to that side of it.