What Causes Increased Heart Rate Along With Pain In Chest?

Ive been experiencing increased heart rate and have the feeling I am going to die, this feeling of discomfort at night was increased and became more regular after I started a new job. my symptoms are increased heart rate, chest pain, shallow breath, feelings of worry and panic, as if I am going to loose it and insomnia. often times at night my body jumps awake as I realize i was not breathing. then its hard to sleep. whats up with me?