Angina is a medical condition which affects the heart, and which is characterised by an irregular heart rhythm and the experience of a stabbing pain (or stabbing pains) in the area of the chest that can mirror a heart attack. An angina attack is so close to a heart attack that doctors warn patients that one can be mistaken for the other one, and that patients should never attempt to diagnose themselves with one or the other: This can lead to very dangerous repercussions for your health and could be fatal if you think that you are having an angina attack but it’s something more serious.
Seek medical attention if either of these happen, and let your doctor make that call. If angina is a problem, it’s likely that your doctor will put you on heart medication in combination with some type of beta-blocker to control the issue. Fainting is possible with both angina attacks and heart attacks.