I am sorry to hear about your symptoms, and I can certainly understand why this is distressing for you. In order to offer an accurate diagnosis, a doctor
would need to review your entire medical history and perform a thorough physical exam. You may also require additional testing, such as an EKG. Only after collecting this information will it be possible to make recommendations. Therefore, I strongly encourage you to schedule an appointment with a primary care physician
Your palpitations, or rapid heart beating, could have several causes. It is possible you are simply more sensitive to your normal heart beat. Anxiety
can also cause this sensation. However, you may also be suffering from an arrhythmia. Common arrhythmias include atrial fibrillation, atrial flutter, and atrial tachycardia. These are often detected by longterm EKG monitoring.
Your chest pressure could be due to anxiety or costochondritis, which is inflammation of the joints within the chest. Although rare at your age, it is still possible you are suffering from angina, which is chest pressure due to myocardial ischemia. This can be due to cholesterol buildup within the arteries of the heart or to an inflammatory process leading to blockages. You will need to see a primary care physician to further evaluate your symptoms.