If you want to know what is causing your symptoms, you really have no choice but to see a doctor.
I am mostly worried because of the jaw pain that is associated with the squeezing in my chest. Do you have any ideas on what this might be?
Stabbing chest pains do not very strongly indicate a heart problem. Pain from pressure also does not indicate a heart problem.
At your age, a sudden heart problem would be exceptional.
But as you can not take risks with your health and you certainly do not want to go on with these discomforts, go see your GP.