Can you have mini heart attacks?

The answer is: no

Mini heart attacks, also known as transient ischemic attacks or TIAs, are not actual heart attacks and are not related to coronary artery disease. TIAs cause a temporary interruption of blood flow to the brain that affects brain cells to malfunction temporarily, causing sudden episodes of symptoms that last only a few minutes. If your symptoms last only a minute or two and clear, it is unlikely to be a heart attack. Heart attacks typically cause prolonged chest pain (or discomfort anywhere in the upper body) of more than few minutes, with no improvement even at rest.