Sometimes, at random times, my heart starts beating really quick, almost 2x faster than normal???

Yes, it is something you should have checked out by your doctor, or through a referral to a cardiologist. It may not be as scary as you think it is: in fact, it sounds like a classic case of atrial fibrillation, which is a very common affliction.

However, the doctor should determine what's really wrong: there are heart irregularities which can be very dangerous, even fatal. And sometimes arrhythmias are indications of other things wrong in the body, such as hyperthyroidism or electrolytic imbalances.

So don't mess around and wait on this one, get thee to a doctor.

yes you should get checked out. the thing is and this is not to put you off, because your young you may find that you are not taken seriously. i wasnt and now they think im paranoid because mum died of a heart attack brought on by heart disease. if you feel you are not being listned to, plague the hell out of the doctors until they do listen. your heart is your only life line and not to be ignored. ps congrats on giving up smoking.

See a doctor ASAP. You only get one chance with your heart.

Please see a health care provider. There are a number of causes for sudden increases in heart rate that require treatment.

I wish you all the best.

It is ventricular tachycardia ; Better consult the doctor.

Better see a cardiologist as soon as posible.