Just woke up sweaty, nauseous, and faint, then cold and shaky?? am i about to have a heart attack?

Heart Attack: If you are having severe, acute symptoms that are concerning I would suggest a visit to the emergency room immediately. If symptoms are milder I would see primary care doctor today for more comprehensive exam and history. If you have history of heart disease or risk factors definitely needs to be worked up. Especially worrisome if you have having chest tightness or pain.