This is a well known technique to reduce anxiety levels but may be new to some friends here. It's very simple.
1. Slowly breathe in through your nose to full lung capacity.
2. Hold your breath and count to four.
3. Slowly breathe out through pursed lips expelling all the air from your lungs.
Take a normal breath and repeat the technique up to six times. This procedure releases natural tranquilising hormones that affect your nervous system reducing anxiety and feelings of panic.
Don't hurry things, just do it slowly making sure to fill and empty your lungs completely.
Remember, a stressed nervous system exaggerates any bad feelings we're having by ten fold or more.
Worth a try when you get the collywobbles.