stress can cause many problems like anxiety, panic attacks, high blood pressure and heart problems as well. I am very familiar with high anxiety levels and constant panicing untill you can't breath. what worked for me is Omega III for the heart and blood vessels, Oxygen extreme for respitory system and relax air channels, and you need a healthy sleep so use a natural and vegetarian suplement like L-Tryptophan which an amino acid that is produced in the brain to maintain healthy seretonin levels and mood stabilizer and promotes healthy sleep, just take it on empty stomach and as prescribed. I believe they will help you like they helped me or better. Good Luck