Really sorry to hear about your situation. Without sounding patronising and judgemental, I would like to reassure you that your response is normal and anyone in your situation would feel the same or possibly more worse. Relationship breakup affects an individual both emotionally and psychologically. One should restrain from taking drastic decisions. Take one day at a time. However if you feel depressed (symptoms are low mood, no interest, no energy, no sleep, no concentration, no appetite, guilt, suicidal thoughts), I suggest you speak to psychiatrist. Best wishes.