Recovering from an Angina Attack

I feel very tired but am grateful that I am this well after suffering one of the worst angina attacks I have ever had.   A few minutes before noon the pain began.  I took a nitroglycerin tablet but the pain worsened.  I waited a couple of minutes and took another plus an aspirin.  At this point I was supposed to call 911 but decided to give nitroglycerin one more chance.  Eventually, the pain lessened and finally abated.  I was dizzy from low blood pressure so I sat on the couch, soon going to sleep for about two hours.  This is happening when my cardiologist of more than five years has resigned from ArkaLa Cardiology, leaving me to find another doctor.