I've had a dry hacking cough for 3 days any suggestions?

Buckwheat honey. Yes, believe it or not, a study suggests buckwheat honey works as well, or better than otc cough medicines. But if your illness worsens, or cough lasts over 2 weeks, see your doctor.
Recommend. My recommendations include drinking hot tea with lemon, increasing your water intake and using a cough suppressant at night like dextromethoraphan. Cough during the day is the way the body protects itself from pneumonia or lower resp tract infection.