Very quick breathing or air hunger. Bad head aches, feels dizzy or faint. When one starts working you, substitute with some positive, mental or physical activity. Don't drink alcohol because of your worries, you may get addicted, as it relieves your anxiety for a while only. Help the anxious people find feasible ways to face their life problems.
Meditation is needed only in crisis.
Which means extreme anxiety with chaotic motor and mental disturbance. You feel very breathless, your heart is pounding, you think you are going to die just now, you are very restless. These are because of the chemical releases from the from nerve ending. Don't worry it will subside. Worrying itself can make you feel sick as well as worsen and illness you might already have, either way.