I've had this cough for 4 months, i vomit from coughing so much. i've tried several over the counter medicine. any suggestions?

See doctor: A cough lasting 4 months warrants evaluation by a doctor by taking history, physical examination and may be lab tests and imagining studies. 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.