If you had called for help in the night mande it is likely a paramedic would have been dispatched to see you. They'd be able to do an ECG to work out if the pain was heart related or not. They would never feel you had wasted their time because if pain does turn out to be a heart attack a positive outcome is time critical.
It was a really good idea to take out your doors keys so that other people can get in and if anyone needs to call 999 in the night it also helps the emergency services find you if you put all the house lights on and ensure your house has a visible name or number.
Hope your new medication does the trick and that you feel its ok to call for help if needed at any time in future.
Severely depressed and confused
It's official: Grandparents are good for children


Definitely don’t ignore it and seek help if it happens again.