Vomitted black tar like substance after heavy drinking & smoking but do not have any other issues, is this a cause for concern?

Please seek: medical assessment. Vomiting black material after heavy alcohol use raises concern for possible GI bleeding.

Yes !, GI bleed: What you described is consistent with bleeding in the stomach. Quit drinking while your are ahead. Alcohol is a poison and it never did any body any good, ever! On top of that, it is illegal to drink at your age. See a doctor for evaluation of your stomach. For good health - Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Drink enough water daily, so that your urine is mostly colorless. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form. Practice safe sex, if you have sex.