Sleep disturbances

Sleep disturbances, such as insomnia, unusual restlessness, or waking up frequently during the night, have been reported as warning signs in some women prior to a heart attack.
Anxiety

Some women may experience a sense of impending doom, anxiety, or a feeling that something is terribly wrong during a heart attack.
Lightheadedness

Feeling dizzy or faint is another symptom that may occur during a heart attack.
Shortness of breath

Feeling breathless or having difficulty catching your breath can be a symptom of a heart attack. This may occur with or without chest discomfort.