Hi,
From your description — sudden lightheadedness, breathlessness, trembling, stiff hands/legs, crying, awareness of surroundings but unable to control, and chest uneasiness afterwards — this episode sounds most likely like a panic/anxiety attack. These attacks can mimic serious heart or neurological events, but they usually pass after some minutes and leave you feeling exhausted or uneasy.
However, since you also had chest discomfort, it is important not to ignore. Heart rhythm problems or seizures can sometimes look similar.
What you should do now:
If chest pain, severe breathlessness, or fainting happens again → go to emergency immediately.
Get a basic check-up: ECG, blood pressure,
sugar,
thyroid test.
If all is normal, consult a physician or psychiatrist for evaluation of panic/anxiety disorder.
Practice relaxation: slow deep breathing, adequate sleep, avoid excess caffeine.
Most times, these episodes are panic attacks, which are not life-threatening but very distressing. Still, ruling out heart or neurological causes first is important.