When full on anxiety and racing heart starts lie down and breathing deep through your nose and then slowly breath out your mouth exhaling all air until your abdomen rises to fill your lungs inhale slowly exhale slowly and while exhaling through the mouth slowly hum the word "vooooooooooo..." until all your air is expelled and repeat it over and over for as long as you like rhythmically 15 minutes, 1/2 hour and hour or more to get your controlled breathing this way to calm your nervous system. The modern healthcare system is extremely flawed out of ignorance and arrogance and I understand what you're saying about the emergency rooms; it's completely wrong and abusive and in these cases they don't help. Unless it's life threatening in some way I, myself, do not go to the ER. If you Google Dr. Peter Levine and watch a podcast where he describes the technique he developed that I described to you above. He uses it with patients to calm panic attacks and nervous system flair ups. I understand you, I empathize and pray daily for us.🙏💜