Calm down dear as someone famously once said.
You are not meant to get over anxious or highly stressed with that angina.
Now sit in a chair and breath quietly and deeply. Close your eyes and imagine you are sitting in a deck chair on your favourite beach. The sun is beating down gently on your face and you can hear the soft ripple of the waves. Some children are happily laughing and giggling as they play near by. In your hand is a glass of you favourite tipple mixed just as you like it. You lift the glass to your lips and take a sip as you remember many happy childhood moments of your own. Someone is thoughtfully massaging you shoulders and as you tilt your head back so a comb carefully tidies your hair. You close your eyes and feel totally relaxed as a feeling of total peacefulness and calm descends upon you.
I hope that worked. Now don't worry it is all going to be fine.