 [ Symptoms ] can an 18 year old girl have a heart attack i am 18 weigh 120 lbs and am 57 my pulse is always racing over 100 and i am always short of breath the left side of my neck hurts along with my left arm is this a problem [ Disease ] it is a problem if you do not know the cause of your symptoms rather than try and figure out what you have or worry about having a heart attack it would be best for you to be examined by a medical professional    someone that can take a thorough medical history examine you order an diagnostic tests and give you the true answer unfortunately this is not something that can be done blindly over the internet